Im on mobile and at work right now. Hence holding off on real reply. I never downvote here unless spam or pure hate. I even upvote opponents when they make good points or state common misconceptions worth visibly debunking. Just for future reference. ;)

Upvoted because I too asked for a source and have yet to see one.

"Upvoted because I too asked for a source and have yet to see one."

Probably because you weren't looking. I spent a little time with Google for you, though, to find some anecdotal, subjective, and scholarly work:

https://news.ycombinator.com/item?id=10935155