I have long believed that the male population is not going to doctors to get a diagnosis and is instead self-medicating and gutting it out. Men generally are not as good about going to doctors as women are.
I think they probably do thou have a good idea of the male and female ratios due to big population study done. Also many CFS specialists talk about the ratio.
Look at other CFIDS sites and see the men there. All ages of men with the same horrible tales that the women have. I would venture that the real true numbers for CFIDS sick are about a 50-50 ratio.