I almost believe that there is another reason for a pre-interview hold. I was put on a pre-interview hold at Buffalo, which I'm still on. Being a NY resident and having very competitive stats with Buffalo, I figured that I would have a decent shot at getting an interview there, an idea further backed up by my getting interivews at the other 3 SUNY's, as well as other schools which are typically considered more competitive than Buffalo. An idea my advisor suggested to me is that perhaps Buffalo sees me using them as a backup school, and though they don't want to reject me, they're going to wait to interview me late in the season in the hopes that perhaps I'll widthdraw my application before they take the time of interviewing me. I don't know how true it might be, but it's another possibility of why you were put on a pre-interview hold, in which case you possibly have a good chance of eventually getting an interivew.