I agree: I have searched for this myself, to no avail. And I could be wrong, but I don't really think T'Joe and company are focusing on that...it is pretty clear that the R1 status is the main goal.
And to the other post about ltu@r, I think they are currently @$20 million, with their goal being to reach $50 million by 2020. As meager as that is, it is only 2 years left to get that done....so seems highly unlikely at this point.
Regardless, and as per Dr. S, by that time we will be R1, so it really won't matter a whole lot anyway. But it will make it that much more fun.