No worries! Other than at some other schools, there is no time frame or early invites for "high GMAT" candidates whatsoever. I guess it really just depends on wether you are on the top or bottom of some pile.

Invites really do go out almost up until the decision deadline. So be patient, try not to think about it and stop checking your status! It might never change (as it was the case for me, and I was checking on a daily basis, if not more!!

). I was "under review" for almost two months.