Based on some VERY prelimary research and testing:
1. If you have AdSense or any other form of advertising (Y!PN) on the landing page, you will get penalised in the Quality Score (QS).
2. Google checks the keyword density of the landing pages to ensure that the keywords match up with the keyword being bid on, and the Ad Text. By using dynamic keyword insertion, this also reduces your quality.
More to come…
Vinny Lingham is an International Award winning Entrepreneur & Search Engine Marketer. He is currently CEO of