The speculations have been sort of correct..
There were 8 people in the 7th or may be 8th batch that attended the interview round in Singapore last week.
Out of 8 guys (5 Mumbai+ 3 Chennai), 2 of them cleared the round and went through the medical.
So i guess, all people from Mumbai who had not received any mail from them have finished their second round by now. Chennai people might start receiving the mails henceforth.