Grog said:
A 2nd level wizard isn't even close to twice as powerful as a 1st level wizard. He gets one extra spell per day, a few extra hit points (but can still easily be dropped in one hit), and a +1 to his Will save. That's it.
Well, kind of yes and kind of no.
Sure you can still be dropped by one blow, but so can the fighter. Any creature could get in a lucky blow at any time to finish off a character regardless of hit points.
As to double power at first level, the 2nd level wizards gets double the hit points of a first level wizard. Okay, you could argue your first level wizard starts with 4 and you have to roll for the second level hit points, but it will be close.
The 2nd level wizard doubles hit WIll save.
The 2nd level wizard doubles his first level spells (minus bonus spells).
The 2nd level wizard double his BAB.
You more than double your 1st level gear, equipment and money.
On top of this, all characters can start to get mad synergy bonuses, if they build their character right.
Does this equal double power? No, not really, but you are not going to start out as a god and work your way up. Well, you might if you find a sympathitic DM. Good luck to ya.
Whether you gloss over the early levels by means of the DM dishing out easy xp in a fast manner, or you pain stakingly draw out each session for 20 adventures, the low levels are needed to give your character depth.
You can skip them, which I have done at times, but in the end, it is better for the game and helps break the meta gamers thirst for buying things as a 5th level character they might not find until 9th or 10th level.
Remember, the starting gold per level is a suggestion and just because you start with 50,000 gp doesn't mean you should be allowed to buy a 40,000gp + sword.
At any rate, the low levels have a place in the game.