While I don't doubt that you know how Ole Miss recruitment is like as a PNM, have you participated in a formal recruitment as a member on the other side?

The advice being given here by the non-Ole Miss students aren't meant to psyche her out. They're just giving her realistic information that might be helpful to her. Some are Ole Miss alumnae and advisors -- I think they're qualified to give advice and let the OP know what her chances are really like. As far as the others go, well...a lot of them come from similar competitive schools and they have years of recruitments under their belt. I'd say they're in good position to dish out advice as well.

In my opinion, telling the OP to go through recruitment but warning her what might be ahead is better than telling her "no worries" and have her endure disappointment later on.