Ditto - I did the same thing. Nada. I figure they're waiting to see how many "accept" the alternate status before sending an official number in writing. Or not.
You shouldn't fee insulted at all, or that they don't like who you are. I view the watilist (or alternate status) as saying that you're Mayo-caliber
and a good Mayo-fit, but there just aren't enough spots for all of us. So, take it as the honor and compliment that it is. And hope for the best.
Realistically, I'm willing to hold out some hope until June 1. After that, I'll consider it a rejection, but not withdraw. It'll be what it'll be. And I feel it's a slim chance, but it's still a chance nonetheless.