I think it shouldn't matter too much - I have to say that QF lh has a few 'tubbies' from what i've seen lately, but it also doesn't seem to effect their work performance which is what matters.
I guess it just challenges the myths of what fa's should look like which is what makes it an almost controversial topic...
I've seen male fa's that would have been easily 220 lb (100 kg) - and it sure ain't muscle
If you can do the job well, then that's what matters most in my book...