I get perfect/very slow tempos about once in every four rounds on the XBox One and PS4 versions in Society play. It doesn't seem to matter whether I'm playing with another live player or not. I never play the game offline, as in purely "offline", so I can't speak to whether I don't get these feakishly slow downswings then.
When I get the perfect/very slow tempo the results are devastating. It's mostly in the form of a tee shot that never gets more than 10 feet off the ground and carries maybe 75 to 80 yards and rolls out to about 110.