No thats not true.
1) First clarification: 42 spots total.. 6 are always mdphd, 2 are oms. 34 md spots. As far as I know, one of those spots is already taken by someone who deferred last year.
2) Remember that Mayo hands out EXACTLY the number of acceptances as spots in the class. They fill their class by March 15th, thus by this date only 42 people will have received acceptances. A waitlist is then formed with some students after this date and the remainder of candidates that had onsite interviews getting rejected. I think about 10 people get taken off the waitlist every year (although this varies).
3) No, most of the people that have received acceptances have probably been on hold. For all we know, someone who interviewed on the first day may have bbeen accepted in this last round after being on hold for months.
4) They are not handing out acceptances faster, they are pretty much right on track. I remember that they hand out their final 5 md spots in the class on exactly March 15th. So I would guess that they are going to give 5 acceptances a month from this point on.
4) It ain't over till its over. Although I remember how much it SUCKS to wait, you could hear anywhere from tomorrow till late june!!! I became really apathetic because I was placed on hold for months until I finally got word. It feels so much more amazing to receive that call when you aren't even thinkin about Mayo!! Good luck guys!! Hang in there!
