There's a couple we used to be friends with (we had a HUGE fight recently over that whole A TIME issue, and aren't really speaking now). They also went through fertility treatments, and were successful.
I think that having succeeded, they forgot what it was like to be going through treatments, and to be so nervous and wondering what the next day will bring. They aren't too sensitive to people going through it anymore.
I hope that doesn't happen to me. Even with our pregnancy, we're nervous, due to the uterine issues we're dealing with. Our pregnancy can end at any time. I just hope that when, hopefully, our babies are in our arms, we'll remember what it's like, and treat people with the sensitivity and respect they so desperately want. If I start acting like an ass, I hope someone slaps me up a bit.