No idea.  I wonder why you are curious about it.  I'm more likely to think,  "I am going to Anycity, USA.  What is the best site to find women in Anycity, USA?"

I'd never thing,  "I like to go website.com to find women,  what is the city where website.com works best."  

I've heard tell that all ten are

down in South America. C'YA. Send me a post card.

start counting and supply us a report by 0600.

2 recent backpage experiences where Bs.

I HATE that fucking site

I swear to God, if I find the person that started that fucking shit I will skull-fuck them to death.

Yeah, I'm a *little* disturbed. What's your fucking point?!

...or just an exaggeration? I admit I waste some time on BP and sometimes even CL simply because they're a great place to play with tineye! Even worse for legitimacy ratio is the 'dedicated' escort adsites. Did you know Jessica Burciaga Centerfold & Cover Girl (the cute brunette in the green jersey holding a football is her most popular 'borrosed' pic) She's working in Vegas, New York, LA AND Sacramento...for $200. And in Vegas you can get her to come to your room for $45! It says so on the back of that billboard truck.
Also I personally know 4 girls who posted on BP and were swept up by Metro.
BP should stand for 'Big Problems'.