I see that a lot of you have queries about waitlist movement. Some information has already been revealed by one of my colleagues. Please realize that we do not have any official information regarding waitlist movement from the Admissions Office, and hence, none of can say for certain how much the waitlist moved. Once you guys join the Google group we have created (the link is in my signature), your questions will reach a much wider audience, which would include people who had waitlists and later converted. So, I request you all to please be patient.
Regarding joining dates, as has already been mentioned, your classes will most probably begin on the 20th of June. Some people will be called for a preparatory course and will have to report about a month earlier. You will be intimated well in advance about your joining date and the procedures to be followed while reporting.
Although no specific date has been for indicating your acceptance, common sense dictates that one need not wait without good reason. If you are really in two minds about choosing another institute, then wait by all means. If you are not, why postpone something good till the last moment ?
I suggest that you all join the group at the earliest, so that all of can know our would-be fachhas better