I think it took six weeks for me to hear back from this magazine. That's certainly a lot faster than many others that consider sci-fi and fantasy. IGMS took a full fifteen weeks to get back to me with a form rejection. Yikes.
I had the same experience. (And, remarkably, I got my rejection in ten days.)I've submitted to them before. I was turned down, but based on the rejection letter I got I felt that they gave my story a fair read in spite of the fact that I'd never been published before, and that their reasons for rejecting it were very sound.