During the Beta, I played BH and loved it too much to switch. So I rolled another BH as soon as I got home from work yesterday and skipped through a lot of the dialogue just because I've heard it already up to around level 15 (that's where I stopped at Beta).
After around 9 hours of play (from when I got home from work to the time I went to bed... With a couple breaks) I got to level 17.
There was absolutely ZERO lag. There were plenty of players online to quest with (PVP Server). But I can only imagine that the lag will get worse throughout the week.
You can honestly tell that BW did some cleaning up with the game. It just seems to run more smooth than the Beta. There were still a few UI bugs here and there, but I never became stuck in-game... I was never booted off the server... I was very impressed with it.
As far as staggering access goes... I can see where many of you might be angry that you didn't get it... But I think that it was a great idea to test their servers because the onslaught of people to come...
Overall I gave my first day experience a 9/10. (A point off because of a FPS issue here and there)
Just my 2 cents. I hope the rest of you get invited today!