Of your list:
Shot: 6
Owned: 1 (HK USP)
Currently own: 0
Hypothesis A: Glock wins most polls because most have it or used it.
I would say there is some truth to that. I tried every flavor of the kool-aid I could get my hands on. (I was told they were the ONLY worthwhile gun) Fired many, never owned, would not recommend.
Hypothesis B: High end pistols will lose polls irrespective of their quality, simply because most people have not used it.
Most people will want a cheaper gun that works over an expensive gun with slightly better performance/appearance. IMO