you have some good points kemp in that they should do more extended beta testings. AoC certainly has its number of bugs graphical glitches, isues that cause crashes....(this list is long but gets dramatically shorter almost every day) Also the chat window sucks, your inventory sucks....(this list goes on here too).
But the problem is with the MMO format as a whole rather than AoC specifically. AoC has given a faaaaaaaaaaaarrrrrrrrrr smoother release than WoW did(and other MMOs) ( and I do mean alot, back in the days on 1.3 when the european servers opened it was crazy bug filled, unbalanced, crappy chat options etc etc and I hear 1.1, 1.2 were even worse in the US (they got the game before EU)).
MMOs area very hard game fornat to develop, they will always have more bugs than games like the ones you mentioned. In those games there are limited possibilities. While MMOs are huge, they will fix one bug, for 10 more to seamingly appear out of nowhere.
Assasins creed, come on, quite possibly the worst game of the century
forza 2-not played much as not the biggest racing fan
Orange box- Valve had a crazy high budget for Half life 2- took them ~10 years to make
CoD4 - great game but definately got tonnes of bugs too
at the end of the day buggy MMO releases wont stop until people stop paying for MMOs at all. For a business to suceed they have to balance developing costs vs bugs vs release vs quality of the game and Funcom has hardly done a bad job.
Personally Im loving AoC atm

can't see myself going back to the same old stagnat oversimplified WoW anytime soon