kittu
I would agree partly. There are top US schools as professional as LBS. Also, I do not think that if a school does not have a FIXED date for sending out invites/results, then the school is unprofessional. It's just the way they work.
I agree with you and that is the reason I said 'some' of the top US b schools and not all of them. And on question of one fixed date, I believe it really depends on what their priorities are. And I won't buy the fact that 'its just the way they work' because every business process has to have a reason behind it, they have been born out of someone's mind. And personally, I don't see any merit in having decision release over a period of one week or more, which only causes tension and anxiety to the ones who are waiting and a large portion of whom would get a negative news. Releasing it one single day eases so many things out for the applicants. If its about its just the way they work then clearly they are not putting their future brand ambassadors at the centre of their decision making.
Just my 2 cents. I hope you won't take that personally.