I've been upset among everyone else and from what I've noticed square had no idea it would get this many players.. open beta 4 they got a taste however not everyone trying to get on now was in that. I've seen numbers fly around but supposedly more than 150k where in beta 4 so I'd guess 200k...we had 3102,90k,1017, and bad que system then so obviously they didn't even expect 200k at once during beta. A week goes by and they make some upgrades...I've seen that early access had at least 800k and launch over a million easily.... the leaps in users in a small time frame like that are insane...all trying to log in at once
and yes they could have gone off preorders but with new servers, graphics..etc they didn't know how much stress the server could take and beta 4 wasn't enough....