Dude, read your own post, it' all hearsay...somebody said, I was told, I heard from my breeder, kind of stuff. The link you provided is a dodge...it's generic drivel about most nocturnal animals.
I've done enough reseach to know that there is no study out there, dinfintive or otherwise. Not my first rodeo.
EDIT - Nice edit to your post to remove the link you provided...LOL