As others have mentioned, part of it is that your stats are much higher than the norm. Still, that is only a few points difference - you aren't any worse than my own bugbear rogue, who might be the highest damage in the party, but not so much so that other characters are left behind.
So, let's analyze your numbers a bit.
Attacks: With a dagger, you are at +9 to hit (+5 Dex, +3 Proficiency, +1 Rogue). A caster with similar stats will be at +5 to hit. When you make attacks against AC, you are typically +1 to +2 ahead of them; when you make attacks against Reflex, Fortitude or Will, you are +4 ahead of them. That is significant - but then, accuracy is a rogue's strong point. And while you can reliably attack Reflex, and can occasionally attack other Defenses, casters are likely to have more options in general, and be more able to target the enemy weak spot.
In any case, you mention your wizards and warlocks need 15s, and you hit on a 5. Something about that is simply wrong. At best - assuming equivalent stats - you should only be +4 ahead of them to hit. If you get Combat Advantage, that's another +2 - which means they are walking around with 12s in their primary stat, which seems unlikely.
Damage: Your damage is also generally in the lead. A dagger will do 1d4+2d8+9 when you Sneak Attack, for an average of 20.5 damage. A Warlock will be doing an average of 1d10+1d6+5 damage with Eldritch Blast and Warlock's Curse, for an average of 14 damage. On the other hand, if they use Dire Radiance or Hellish Rebuke, they will deal 2d6+5 damage, plus another 1d6+5 damage if they trigger the power's condition, for an average of 20.5 as well. It is certainly harder for them to set up than for you - but they can use these attacks from ranged, while you likely need to go into melee to reliably get Sneak Attack.
Possible Damage: You mention how much possible damage you can do in a round, if you use Trick Strike, plus an Action Point for Torturous Strike. You end up potentially doing up to 63 damage! But that is a bit of an exaggeration - on average, hitting with those attacks will do 43.5 damage. (Still pretty good! Enough, in fact, to take out a single low-level enemy - though the resources you spent for it are somewhat significant ones.)
So, how do other classes compare to this?
A Warlock could use Flames of Phlegethos (3d10+5 +1d6 curse), and then Action Point for Vampiric Embrace (2d8+5.) His potential damage is 52, with his average damage at 38 - only 5 points behind you. Add in the 5 Ongoing damage from Flames of Phlegethos, and he seems to be comparing just fine, damage wise. You are still ahead on accuracy - but he's able to blast from 50' away, and can benefit from concealment, temporary hp and other protective measures.
A Ranger with Bastard Swords could use Jaws of the Wolf (2d10+5 x 2, +1d6 Hunter's Quarry), and then Action Points for Two-Fanged Strike (1d10+5 x 2, +4 Wisdom). His potentially damage is 89 damage! His average damage is 60 damage, putting him well in the lead for 'nova' damage. His accuracy is slightly behind yours, but his Daily Power deals half damage on misses, which makes up for that. Now, to be fair, your at will attacks are going to be more effective than his - but clearly his potential damage is pretty darn good.
A Wizard who casts Freezing Cloud (1d8+5 x 2) and uses an Action Point for Icy Terrain (1d6+5) is doing a potential 37 damage, or an average of 27.5 damage. Of course, his attacks can hit multiple targets - if he only hits two enemies, he is suddenly on par with the strikers, and if he hits three foes, he is well in the lead! Wizards can't always rely on hitting multiple enemies - but when they can, they definitely bring the pain.
We could run similarly numbers for other classes - clearly, any character with good stats and well-chosen powers can go nova and unleash a ton of damage in a short period of time.
Yet, clearly, you haven't seen this at your table - only you are the one doing really impressive amounts of damage. And while a rogue is likely to be the top damage dealer, he shouldn't be the only one.
But if the rest of your group is mainly non-strikers, with the only other striker being a warlock (who are the lowest damage striker, in general), and with you having rolled excellent stats (and they, perhaps, having rolled poor stats)... well, that might well be the reason why you seem the only real damage dealer. It also sounds like the enemies you are fighting are designed incorrectly - a level 9 solo should utterly destroy you, and even if you could kill it, it would certainly not take only a few turns. That, combined with the strange discrepancy in Defenses (with you hitting easily, and others having an incredibly difficult time of it) indicates your GM may be the one statting things incorrectly.
Finally, note that while the rogue is the highest damage class, it is also rather fragile - in order to reliably get Combat Advantage, you'll often need to move into melee. While you can get the occasional Sneak Attack by hiding and sniping, dodging around corners and so forth, that will likely only be possible once in a while. And once in melee, with low hitpoints and few healing surges, you are likely to run out of healing surges after only a few fights. And that is the tradeoff made for being a rogue - you can kill the enemy, but unfortunately, they can also kill you.
