Now from what I understand each round is 6 seconds, I want someone to see how many punches they can throw at a boxing bag in 6 seconds, my guess is that it's many more than only 1 attack, hence the reason I don't care for only rangers having the skill to swing both their weapons in that 6 seconds, hopefully WotC fixes this rule with adding some more powers to other melee classes that allow the two-weapon fighting rule in new manuals that will be released within the next year or so."
In 1st edition each "melee round" was 1 minute...then in 2nd there were 6 10second "melee rounds" in a 1 minute "turn" IIRC. In all editions, one round has been defined as the amount of time it takes, in a fight between two skilled combatants, for each of them to find an opportunity to land a telling blow on the other. For the other 5.5 seconds of the round, both combatants are sparring, probing, feinting and looking for that opening. Of course in earlier editions characters could gain extra attacks by various means; 4th ed has decided this was broken and has seriously limited it for characters and monsters.
Before everyone jumps on me for talking about fictional characters, just think on it, why only rangers, why not a two-weapon fighting fighter or rogue? Seems to me the guys who wrote the new rules didn't think on it very well, just my opinion on the matter, changing a pretty cool fighting style that other classes could have in older versions to only one class having or another mutli-classing into and not getting their other cool "powers".
Why can only rogues get extra damage from a sneak attack? If my fighter has successfully hidden, and his enemy doesn't know he's there, shouldn't he be able to hit a vital spot even though he can't pick a lock?
Don't get too hung up on the class labels. A class is merely a set of skills chosen as a group. Rangers can deal strong damage with a bow, attack twice per round in melee, wear light armor, have a wide variety of skills, and can move on the battlefield more effectively than most characters. All of this comes with the ranger package.
The fighter package includes being tougher (HP and surges), wearing heavier armor and often using a shield, using each type of weapon in unique ways, a limited skill set, and being able to threaten enemies and keep them from easily attacking your comrades.
If you want a "2 weapon fighter", what you want is probably a ranger-set with an armor feat and toughness. The character may call himself a fighter, he may never have heard the term "ranger", and he may have treephobia. But his powers will be the power set that's designed to work with two weapons.
To give two-attack capability to everyone would hurt the ranger class as much as giving everyone sneak attack would hurt the rogue. You can certainly do it in your game, but it will change the game more than you might think.