First of all, didn't somebody disprove that first statement of yours?
Nonetheless, it's besides the point. NYU has a weird admissions process. I mean, wasn't someone floating the theory that nobody who interviewed on or after November 15th has been accepted? It sounds like NYU overaccepts at first, waits for people to decline acceptances, and then accepts more. If the November 15th thing is true, it has nothing to do with "higher grades/mcat scores." Do you think that nobody in the last two months of NYU's interviews had high grades or scores?
People didn't flame you for being negative. They flamed you for making a point without any persuasive evidence to back it up.