@mbarealestate and @snipes
Sorry that there've been no invites as of yet. I don't know this for sure, but I have a suspicion that SOM's yield from R1 went way up this year, either because more people see it as a valid 1st choice, or because Dean Snyder has directed staff and students to do some pretty serious outreach. (The new building and climbing in the rankings can't hurt, either.) My conjecture, (I could easily be talking out of my ass), is that they were expecting to get somewhere similar to last year's yield, (approx ~100 in R1), and it's coming in closer to ~120-130, so they are paring back on R2 invites. It did seem, however, that the waitlist grew for R1ers.
Regardless, nothing is set in stone yet. SOM R1 is very early, as is the deposit deadline, so they may see some folks fall off the list after getting into their dream schools, or getting big $ offers from another 10-15 school.