Adsense Vs Yahoo Publisher Network, Which is performing better for you?

I've heard alot of talk about the YPN paying more than adsense, is this true? When I used adsense on Talkfreelance I was only making $5-10 per day, I was considering the options on YPN on Talkfreelance but i'm not sure it will perform any better, i've also heard there are some restrictions to YPN.

From anyone who has tested both networks or for anyone who is running sites using both, which one is currently making you more revenue?