I'll admit, after reading the story of a "restaurant" that did a "study" (sorry for all of the "quotation marks"), I thought it sounded legit enough to post it on Facebook, so I did. Later, I read another article on the Happy Place blog that disputed some of the "results" listed in the original article. Are you still with me? Good.
I usually try to check things out at places like Snopes.com (an excellent resource for sorting out online fact from crap), but this time, I didn't do any fact-checking. Happy Place did, though, and you can see what they concluded here.