I think given the thinner air a cork would fly farther in town park that say, in Seattle.
Same reason a baseball flies farther in Coors Field than, say, AT&T park . . . ? Right?
I don't know if the potato chip bag vs. sparkling wine bottle is an apples/apples comparison. A potato chip bag expands at altitude because the pressure where it's packaged is greater than that at town park and the packaging can't contain the lower air pressure at altitude. A sparkling wine bottle, is that, a bottle and contains the pressure difference better than the potato chip bag.
However, I think the lower pressure difference at town park is certainly responsible for an excess amount of flatuence in Telluride - given the potato chip bag scenario outlined above . . .