Planet13 - 7:58 pm on Jul 18, 2010 (gmt 0)

2. Google brings my page back, notices something wrong and removes it.

Just a thought here...

Is it possible that SERP click through rate is becoming a bigger factor in ranking?

Maybe google is giving your URLs a brief testing period to see what the user click through rate is in the SERPS before deciding where it will rank them on a more permanent basis.

Instead of finding something wrong, google says, "Well, it's time for this URL to get some temporary exposure so we can determine the CTR before assigning it a more permanent value."

And I wonder if it is also looking at domain-wide CTR as a factor on individual page ranking. So if MOST of the URLs to your site have an above average CTR, then there is a little boost giving to each individual URL ?