Read all the literature, and read between the lines on all the info out on the www and elsewhere and speak to the people running each one.
It's a broad statement summing up what most people know and agree to be true. Most not all.
Of course there are variables to consider, as everyone knows, but it still correctly answers the question in this post.
Are you another AFD groupie who can't handle the truth?
Seriously, I notice you run AFD heads. I'm sure if you owned a set of CHI's your response would have been different. So it seems it is you that talk out of your arse - bias to substantiate ones own position always gives me a laugh.