One of my initial complaints about YPN was the fact that their large rectangle only showed three ads with a larger font as opposed to the same ad size in AdSense which showed four ads with a smaller font. Lo and behold, feedback has been taken into account and some of the YPN ad units have received a makeover.
Screenshot of the older style with the larger font and three ads per ad unit:
And a screenshot of the new style with a slightly smaller font and four ads per ad unit.
This is a good change because this was one of the factors that might have contributed to the vast differences in CTRs that many publishers have seen. It gives a visitor four ad choices rather than just three.
The skyscraper is another ad format that may have also received the makeover, although I do not have “before” screenshots to compare.