qstor
Adventurer
I don't agree that it's bad in play. Where it really bogs down for me is before: creating adventures. That's the real time suck.
This is getting off top of the thread. Perhaps I should post a long in depth thread with my issues with 4e but....
I think if you have familiarity with any RPG system, the setting you're using and ideas of where your players are headed you can throw encounters together quickly. I would say that I could throw a 1e, 2e, 3e or Mongoose Traveller adventure outline together in 20 minutes one that I'd use for a home game. I've written five Living Greyhawk adventures and those took a while since they were like twenty to forty pages.
GURPS maybe a little longer. I don't have in depth knowledge of 4e yet but with the DMG, MM in front of me maybe two hours.
There's online NPC generators for 3.x so high level NPCs and towns could be done quickly.
As to Merric's post about the latest 3.0 stat block, I agree that its difficult to use. I was so used to the older stat block that I had trouble using it.
Mike