I’ve started splitting out some of my sites pageviews in adsense. When you do CPM buys on google now you can make ads show site wide as before or you can make them show up to users under 27, users 27-45 and users over 45 years old. When you search for plentyoffish when doing a CPM buy multipul plentyoffish sections will show up each allowing you to target sections of the site or demographics.
The following are the biggest advertisers of the last little while via adsense, followed by number of clicks on their ads. As you can see dating sites dont’ even show up, and I hope that better targetting will rise prices for my in demand demographics/sections.