I don't think I am contradicting myself or it's the fault of my bad english.
What I wanted to say is your experiment cannot be used as a way to prove Google don't like parked pages.
Simply because the content is no longer the same in your experiment and content is king in
SEO.
Now, YES I share with you that Google as any search engine don't like parked pages and it's NORMAL.
If you want to benefit of search engines traffic you must serve sponsored links through XML or at least don't use parking companies that ask you to change the DNS to their static servers (SoldNames.com for example distinguish sites vs parked pages thanks to the DNS checking ... its' easy).
Even made for AdSense sites are detected by Google (at least the most basic ones) and penalized.
All the challenge of search engines is filter the crap to show the information the most accurate and valuable. It's not an easy task...