I'm not familiar with the others, but Motley Fool's CAPS certainly does... I.e. http://caps.fool.com/player/gibybo.aspx shows accuracy, score (this is % return after subtracting the index), average score (same thing, but per recommendation), plot of the score over time, and the performance of every recommendation.
I actually constructed some simple trading algorithms based on the CAPS data and back-tested them. I didn't find anything to exploit... didn't put that much work into it, but did enough to convince myself that following "nobodies" was probably not worth the effort. I moved on to trying to analyze professionals. Finding this to be mostly noise as well, however some of the outliers appear good enough that maybe their performance is not chance alone. It's difficult to analyze, see my other comment.
