This is all a rough guess and can change year to year so take this information with a grain of salt. The last person I personally know to get off the waitlist was notified in late July. I'm not sure about the class full email, but from previous years it sounds like they have not sent a class full email.
It's impossible to know how many people are on the high waitlist. They almost always clear the high waitlist and at least part of the normal waitlist. To put this into perspective, last year a lot of the high waitlist was offered Windsor initially as opposed to previous years where they h