Did they just swap the drives, but leave the props on the original side? I can see them swapping the drives for the reason of even wear, but to change the props too w/o talking with you 1st? Unlikely
They would have had to also swap the cables at the cables at the shifters if they did swap the props. If just the drives, you won't notice anything.
As far as prop direction:
Mine was worthless around the docks, especially backing up with the props turning in. Swapped to turning out. Night and day difference. I'd give up 10 mph for the manueveriabilty. Course, mine already goes 120, so what's 10 moph less?