I am pretty sure we met at one pointAlso... ABC Family's 25 Days of Christmas - Christmas Specials Wiki
I am pretty sure I watched it on ABC 25 days of Christmas this weekend. You will concede that Muppet Treasure Island is mainstream right? I'll give you almost every other muppet movie as not mainstream however those two, if asked, are the two that people will bring up if you ask them about muppet movies.
Hmm, might have to re-evaluate. I'm just going off personal experiences like having to talk people into watching it, or having a hell of a time finding a DVD copy once my parents VHS wore out. Compare that to the heavy hitters (Grinch, Rudolph, Christmas Vacation, etc.) that you can pick up at any Walmart come November.
And would most people really list Treasure Island if they didn't grow up in the 90's? I'd think you'd get WAY more people that say the original Muppet Movie or the new one from a couple years back.