I don't know about numbers or stats on the tournament. But, I've competed in no-gi tournaments for 10 years now. I've definitely seen a decent number of nogi matches.
After watching those matches at Gracie Nationals 2014, I can say that anybody who thinks 100% nogi training doesn't work, or 10th Planet doesn't work, or rubber guard doesn't work is crazy, uninformed, or a liar with an agenda.