You will not believe this but just had this discussion at the table this evening while eating out with family and in laws(wickedly mean inlaws, at that). I was mentioning this very news story to one of my sons as support to my historic insistence the that TP be placed on the roll and that it be placed correctly. The others overheard it and we were discussing it all, when the wicked MIL says loudly, "I just don't know WHY we are talking about toilet paper at the dinner table!!!!"
And I smiled sweetly and replied, "Because that's just how we roll."
She didn't even get the joke but I got many laughs and air fives from that one from MY family at least.
It doesn't matter. I would say..whatever works best for the situation. We don't even have a tp holder in our bathroom. Too small of a room. So it sets on a shelf.