Interesting reading.
Despite being overweight, I have no doubts at all about my ability to safely open any emergency exit if the need arises.
What concerns me is the comment that a fat person might not fit out of the wing exits!
If that is the case then surely very large passengers should always be seated closer to the conventional exit doors-in an evacuation one of the worst things possible would be to have one big(and likely strong or panicking) person trying to get from the centre to the front or rear of the plane against the flow of some of the rest of the pax?
Just how small are these exits?