Hi PKumar,
I wouldn't give up already - I would assume that yield ratio is pretty high this year, but I believe we would still see a decrease of a couple of dozens here.
My best estimation is that some of us would hear from them this Friday or next Wednesday (according to historical threads, those seems to be the "hot" days in the week).
I assume that chances of getting in after such movement decrease significantly, and are practically arbitrary, because the class is almost full and the potential for people who decline the offer will decrease.
Bottom line, I would be patient for another week, and then reevaluate my next steps..