Chris13 - 4:58 pm on Mar 15, 2013 (gmt 0)
I experimented last night and turned off interest based ads. Twelve hours later, the CTR dropped to almost nothing. When I checked the ads, it showed about 50% related ads, but also showed an ad in German and many dis-related ads.
So being one of those 5000 sites, means content ads are fubar, at least for the time being.