Heya:
There are at least 20 servers (of a total of, what, 80?) that are having _severe_ problems. If you look at the stickied posts at the top of the official WoW General forums there is some discussion of these problems. Then the non-stickied posts made by regular people are brimming over with discussion of the problems.
There's definitely something kerflooey with those 20 servers. They're up and down a lot, experience horrible lag, and have other problems. Anyone who started on those servers, I feel for ya.
I was the first in my guild to get the game (drove up to LA for the midnight release, ugh) so it was up to me to choose our server. Fortunately, I chose the Garona server and despite a few problems in the first month of release, it hasn't been too bad. There was extremely noticeable lag last night, however it didn't prevent us from clearing all of the pre-key area of Blackrock Spire. And Omokk dropped his gem, so just one more gem from Wyrmthalak and I'll be keyed, woo.
They've stated that the reason they're not sending out more copies of the game is because they can't guarantee a fun environment right now with the load. Or something to that effect. I don't believe they're trying to create more demand.
For anyone who has actually managed to find a copy of the game somewhere I'd strongly suggest looking over the General forum to see which servers should be avoided. And don't get too attached to whichever server you choose, of course. If I had somehow chosen one of the Broken 20, my guild would have certainly moved off of it almost immediately.
Lastly, um, don't look too closely at the World of Warcraft official forums. They're really kind of a cesspool and finding the good posts among the vast majority of dreck is a challenge (and can be depressing, to boot).
Take care,
Dreeble