In general I think that the 2/3 rule applies, but you can argue with me just for the sake of arguing. The study is pretty well done and it covers the majority of larger law firms.
Also, the OP didn't specify whether he had a Biglaw callback or not. Why is it that you folks that go to lower ranked schools love to argue just for the sake of arguing on here? I just pointed out NALP as a step in the right direction for what the OP appeared to be looking for.
Sorry you have "very very good grades" and didn't end up in Biglaw. That's life at a lower ranked school, get over it.