Maybe for a $1200 bottle, but not a $120 bottle. Even my local BBQ spot has a $200 bottle and there it's self service except for drink and food orders. I'd say most of my frequent spots ($20-30 for most expensive entree) have at least one bottle in the three figure price range.

However, tipping 20% on a $120 bottle would be more than half of what I tipped the last time I went to a fancy place where the staff folded the napkins every time someone got up to go to the bathroom. That was a 40% tip on a $100 meal for two (with corkage fee) where I felt the service was excellent and included far more than just pouring a few glasses.