I've been with Adsense for close to 2 years now and have just converted one site over to YPN. With Adsense, I have never had any trouble with the relevency of ads. Now after switching to YPN with the one site, I get 4 exact same ads every page and they are not relevent to the content. I tried recaching, refreshing, etc... and still only sees the same ads.
Can anyone tell me how long it takes for YPN to serve relevent ads on your site? Or what I have to do to get better ads?
Yes it will take a few days before the RON ads go away. Also I strongly recommend you use the Ad Targeting and categorize your pages. YPN does not target as well as Adsense so using the Ad Targeting will improve your CTR till YPN can get more ads and fine tune their targeting.
I have found the Targeting option to be a little slow to click in at times, while other times it happens instantly.
One interesting aspect is that I had one of my sites go down for a weekend due to a worm, and when it got back up, all of the adds were for phpBB (on a forum site). They were spot on for page content before that. Needed to revert to Ad Targeting until it is resolved- if it ever is.
I had to reformat my site by moving my articles into folders so I could target the folder and not all the articles. It is now a lot easier to manage the ad targeting. The problem is that all the ads got reset and now are starting over again so I have to wait a few days for YPN to get it the ads right again. Also have to get the search engines to reindex the site.