DS HATED being on his tummy. He would scream from the moment I put him down to when I picked him up. Nothing would distract him.
He spent very little time on his tummy as a result. Maybe 5 mins a week, if that.
He is absolutely fine. He was a little behind his peers for a long time, but not just physically and not outside what is considered "normal". So I'm inclined to believe he would have been anyway.
He is now 2 and 8 months and developing just fine.