I think the way they surveyed that is a little skewed. They went to a dating website and looked at the amount of people that are just looking for casual sex. Sounds pretty scientific if you ask me.
CBS News is just the wire service. The source is some dating site that used stats from its own members. The method of that isn't given, so it's subjective. The purpose is to promote the dating site, not to be accurate.
So what you're saying is... the title should read: CBS News: Portland, OR has the most prostitutes on craigslist.
Yeah, who would go to Craig's list or other dating sites to get laid. (you know who I'm talking about) Also, I would have thought Las Vegas would be on the list.
Worse yet, who would go on the CraigsList dating site pretending to be someone else? (you know who I'm talking about)