I don't believe that site is even using census data or at least not in the correct way. Ratio should be separated by age groups. Counting > 60 yr olds is a mistake because at that point women outnumber men 3:1 at least.

San Jose has been forever in the headlines as one of the worst cities for men to date, how is this news to you just now? http://www.nbcbayarea.com/news/weird/San-Jose-Looking-More-L...

San Jose

>> The U.S. Department of the Obvious finds that there are 117 men for every 100 women in the age range of 20 to 44 years old.

>> Mountain View has a ratio of 125 to 100.