Must be - I try to make healthy choices when I go out but it's almost guaranteed to come back. Oddly, fried with the breading pulled off doesn't usually bother me. I wonder how much grease soaks into fried chicken when any breading or skin is pulled off?
I would imagine that when its skinless and grilled they brush it with oil, or its marinated. The breading may absorb the majority of the oil when its fried. If you have issues with restaurant chicken maybe get fish?