Well, just last year we turned away for Ford and Sterling Johnson. Those two situations ended up being very public. We also turned away the DE from Oregon either last year or the year before (think it was '14, can't remember for sure though). Like Johnson, he told someone in the media he tried to commit to us but we wouldn't accept his commitment. He ended up at ASU IIRC.
Aside from those that went public public, we seemed to rather suddenly stop recruiting D.J. Johnson who had named us leader earlier in the process. There was also a DT from NC last year (Quentez Johnson or something like that) who had us as his leader for a while and then suddenly committed to NC State. I really believe he made that commitment because we turned him down. It was also pretty obvious that we turned Emmanuel Olenga away last year.
So, yeah, long story short, I believe it.