Yair said:It is too fast in the game-world. Too much change in too short a time, without any due cause. It just stretches believability for me.
This has been true for every edition of D&D, ever. It's a game mechanic, not a realism mechanic.
(I could quite easily progress from 1st to 20th level in AD&D in under a year of game time...)
What I do like about 3e is that the rules give you a much better handle on adjusting the speed to fit your needs.
Cheers!