For Christ's sake, just give people a estimated date range. Hell, I'd at least like to know what the scheduled rate of invites was projected to be. If I pre-ordered in the first 10 days do have a projected chance of getting in today or only 1st day redeemers?
Seriously, I don't need an exact time. People would like to know if they are, in fact, wasting their day looking for an invite that you suspect will not come today. It's like you're being ***** about this for the sake of being *****. What's the worst that can happen. You give your estimate and exceed it? People playing now (including my wife) are talking about how empty the servers are. Why are the testing the server load now? That's what the weekends were for.
What are you going to do on launch when 300K people show up at once? You don't really think all your subscriptions are gonna be pre-orders, do you?