The wait is getting difficult for me too, though it also gives me hopes that the invite can still come.
Anyways, I inquired a few of this year Stan grads (Indians) and figured out that there is no such order and last year many of them got the invites around 4 weeks prior to the result. Given the fact that the application deadline and result interval has decreased, it can mean that we can still be hopeful till say atleast by the end of 3rd Week of November. My sense is that not more than 30% of the invites have gone out. 6 weeks remain, almost 4 weeks gone, so ideally should have been 40/60. But I assume that a large number of invites will be sent between 2nd to 4th week of November.
Also being an international applicant that I am, I also can be hopeful by thinking that they might actually be looking to find some available alums in the region before actually giving out the interview invites and this can be one of the reasons for the delay.
Most of what I said are mere assumptions... but there is no harm is being positive and hopeful
Best of Luck to everyone out here
Cheers!