No, I am fairly certain that if they have a class of 135, they will accept the first 135 students that pass muster at the adcom meeting. This is of course assuming a rolling admissions, which is most but not all schools. Basically, if the first 135 interviewees were all great, they would accept them all and waitlist everyone from then on...not likely, but thats the approach. Definitely, more than the 135 will eventually be accepted without waitlisting, by the time the interview season is over.
What this means to people like me and you, who are stuck on waitlists, is that there is almost NO movement on these lists until May 15th, and actually until a bit after, when people are forced to choose one acceptance. Start warming up your "What is the matter with you people holding all these acceptances" threads....