Yes, I'm in polecon (broadly) and the faculty member that contacted me is too. I think some offers have gone out to IR/Security but I may be wrong. No idea about other subfields. I'd hazard a guess (nought but a guess) that the three of us that got calls on Sunday were 'phoned by the same person, so they might be doing it by advisor. Holding thumbs for you...
The way I figure it, MIT is contacting its admits sub-field by sub-field (or advisor by advisor). I have no idea if there will be more acceptances, but they don't seem to be going for an all-in acceptances/rejections strategy at this point. I'm receiving my offer package tomorrow by FedEx, and was 'phoned on Sunday (early Boston time I think). Good luck, and keep your chin up.
I was at the Durban campus, but Maritzburg is a fine place. You've been to SA, or are you a fellow Saffer? Glad to see you got an admission, I recall you stressing (lol) a lot on the boards a few days ago.... such a relief when it happens...
Long time lurker here claiming the latest MIT acceptance... they tried to call but my number has changed - followed up by email about an hour ago. Stats if interested: 740Q/730V/5A, Ugrad from little known South African uni, currently doing Masters at major UK uni, no pubs.
Good luck to all...