Thank you! I was starting to think maybe I had imagined it lol.
Whipping the butter to make it easier to spread does make sense....and shouldn't in theory change the taste. I definitely didn't like the added sweetness though.
In terms of the upscaleness of the places.....well it probably varied. I definitely remember seeing it hotel breakfasts though....but that doesn't really help because they could have been at a Marriott, Sheraton, Holiday Inn, Best Western, or a boutique place. I do remember the butter(?) being served in little round pre-packaged pots though (I soon learned to look out for the ordinary rectangular pats of butter instead).
Actually that reminds me of another butter pet-peeve...when a hotel or restaurant takes those little individual pats of butter straight from the fridge to serve them or store them on ice....how on earth are you supposed to spread them? If I'm in a hotel with a toaster I usually put the butter pats on top of the toaster whilst I'm waiting for my bread to come through