When a writer makes an effort to be excruciatingly correct the result is sometimes just the opposite. In the case of this article from Yahoo! News, it appears that the writer remembered that one uses fewer for things that can be counted, and less for mass amounts:
That rule, however, has exceptions: less is used before a plural noun that denotes time, money, and distance. So, the correct expression is “less than six months.” You’d also write “less than $50” and “less than 3 feet” (unless you’re writing about a three-legged dog).