In general I've been pleasantly surprised at how stable my own realm has been since the launch. Yes, we've had queues, restarts, lag, and yes, we've also had an insanely annoying subgroup of people with absolutely no scruples over stealing quest spawns (to be fair, this isn't Blizzard's fault, unless you count their refusal to allow us to kill members of our own faction. I have been sorely tempted over the last few days). But in general, play has been pretty trouble-free apart from the crowds you'd expect at all the usual quest hubs, and the response to the expansion has been universally positive from everyone to whom I've spoken. Wrath, at least on my own realm, has gone live to a very happy and excited bunch of players.
But with a look at WoW Insider's inbox, I'm not sure it's worked out that way for everyone. We've seen a spate of recent complaints about server crashes and giant queues, and this weekend we've gotten a lot of them from people playing on Oceanic servers particularly (one of our readers, James Flannery, wrote in to tell us about an Oceanic server queue that went from 86 to 161 minutes during the half hour that he'd already been waiting). While in general I think it's safe to say that Wrath's launch went much more smoothly than Burning Crusade's did, I'm not sure everyone's benefited despite Blizzard's efforts. Possibly it's a function of Wrath being even more popular than anticipated in certain regions. If you play on multiple servers, which realm(s) seem to be doing best and worst? Have queue times (if they existed) and server lag improved for you?