For me, it may be that the toilet paper roll needs to have the open end away from the wall. I don’t want to reach under the roll to take a piece! That’s ludicrous!
That or my recent addiction to correcting people when they use “less” when they should use “fewer”
Not the best source, but there was a reddit survey with about 1000 people, and it was roughly 1:2 for standing vs wiping.
Interestingly enough there wasn’t much difference between men and women when it came to standing vs sitting.