I definitely noticed more hair falling on creatine, but I haven't noticed it since I began taking whey protein isolate a couple months ago. I take one scoop per day of ON 100% Gold Standard.
My muscles have gotten slightly bigger, but the most significant thing I've noticed it they've changed shape. I was getting blockier muscles before, and now they're leaner and look a lot more attractive.
I'll continue to monitor, but I haven't seen an issue yet.
One critical factor that I wonder about, is if whey users also were on Propecia and Rogaine. I am.