I agree with the whole post but excerpted just that part because it raises a funny point... Mimi has been cited as among the most enthusiastic (by me among others, although she can't kiss and the "I love yous" are an annoying distraction) and among the worst fakers.
IMO she's not faking, and in my experience very responsive and not fully in control, but who the fuck knows...
Besides that I will note that enthusiasm and faking/not faking are different things, though they certainly overlap - ridiculous enthusiasm suggests faking, which in turn kills the entire point of the enthusiasm. And a list of the most enthusiastic should draw a lot of worst faker claims.