I could take it that way as well. Honestly though, if they are inviting more tomorrow than they did today, I don't see why it wouldn't be possible to have everyone who pre-ordered in by Thursday.
I will keep hoping, and see what happens.
Maybe I'm being wishful but after reading this I'm convinced that all pre-orders will be in the game by Thursday Dec 15th.
Quoted from Stephen Reid today (Dec 13, 2011 at 2:44pm)
I think they plan on those who pre-ordered getting at least 5 days of playing. Even those who pre-ordered in November and December.