no more need for mittens?

If this article about fat people not needing mittens is true... I've been overweight my entire life, and yet my hands and feet are always cold? I've bought mittens every winter, and since I began knitting, I've always made myself mittens, because my hands are always cold! (Even in the summer!) So what's up with this article?!? Is the decrease in mitten sales really linked to obesity, or is it that maybe more people are just knitting their own?