Yes, that's my personal experience as well. However, I've also contributed to Google Maps (and OpenStreetMaps) for missing locations that weren't entirely new.
I don't have any data, but I would not be surprised if a significant number of Google Map locations were created by patrons of a venue and not its owners/employees. Facebook Pages, on the otherhand, I see being set up and and maintained by an owner.
That's correct, Maps crowd-sources data if no owner enters stuff. You can even see "Is this your business?" sometimes if the owners haven't bothered to do it. Which, I mean, fair enough.
I don't have any data, but I would not be surprised if a significant number of Google Map locations were created by patrons of a venue and not its owners/employees. Facebook Pages, on the otherhand, I see being set up and and maintained by an owner.