Str82u - 4:00 pm on Apr 15, 2013 (gmt 0)
You're talking law of averages, right? That's what I've always thought about them and ourselves, "Got a good flow of mostly happy users, don't screw that up to get more clicks, get more users". I think it's o'kay to say G has tried, and probably continues to try, to boost it's CTR on SERP pages but too many users clicking into ads is going to make unhappy users <-- Law of averages here says a large number of landing pages will upset users.
They just need to have people come back to them and it'll happen often enough.
What kind of effect would it have on a site if they were naturally #8 on page one of the SERP but had the #1 ad for that result and got all the clicks? Would the site move up from #8? I've always just assumed the ad CTR is recognized differently than a listing CTR (different redirects and all).
A SERP is a mix of organic and ads