By this I mean the stand coming in from the top, with the wingnut beneath the bell. The cymbals are still the correct way up. Is it just a visual thing? I mount about half of mine this way sometimes, and I swear they're more resonant? Discuss!!!!
I believe the "upside down" thing originally stemmed from guys hanging them from those gigantic two tiered racks back in the 80's. I still see the odd ride cymbal hanging from an inverted boom on a stand, but I'd be willing to bet everything I own that it's nothing more than aesthetic.