To get back to the original question - to me, it depends on the spirit of the comments. If people are just being enthusiastic about how steep the skiing was or how tight the chute or whatever - well to them, it *was* steep, tight, etc. I try to match their enthusiasm. And I'm sure people have done the same with me, because I skied something that was steep, etc *to me.* Good ski instructors do this - they reflect your enthusiasm back at you.
If, on the other hand, they're bragging .... I probably won't match their enthusiasm, but again, why piss in their Cheerios? Let it go. And I've learned that sometimes, I totally misread the situation - the person I thought was a gaper is actually a ripper. So, good thing I kept my yap shut, right? You don't really know which of you is the gaper till you ski together.
Let he who was never an intermediate skier with delusions of expertise cast the first stone.
As long as everyone's having fun, it really doesn't matter. (Grouping up for cat/heli skiing or BC travel being exceptions.)
NB - I'm sure I've violated these principles plenty, and I've definitely been the gaper in the scenario. But the above reflects the attitude and behavior I aspire to exhibit.