Whizbang Dustyboots said:
And if you can play WoW for two hours, you can get in a group and do a dungeon.
I play WoW, and rather like it (been playing since it was released, and my first character just got his basic griffon, yahoo!

, but, finding a pickup group and going through an instance in two hours? Eh, not in my experience. YMMV, I guess.
Just getting a group together can take two hours. And, unless the group is fairly well balanced (i.e. has a good healer, dps and tank) and experienced, you can count on wiping once or twice due to stupidity/bad luck. 3-4 hours for a pickup group on a small instance sounds more likely.
Of course, with a good and well-matched group, it's a different story. But the odds of such a group gelling instantly from a bunch of random folks is, well, small.
Now, playing with a random group in D&D insider (or any other online rpg site) will have some of the same problems, but provided you luck out in your choice of DM, he (or she) can mitigate a lot of those problems by adjusting the story and challenge to be more appropriate to your group. (Not sure whether a bad DM is worse than a computer AI.
/Jonas