This Monday vs. last Monday, with the theory being that the only major difference is the Google redesign. Only one day of data yes, but every click costs so preliminary is better than nothing.
Our daily budget is more than $500 but less than $1k. Stats are for 3 campaigns, but all individually trended the same way. All three campaigns have an average position of between 3 and 4.
Impressions: are up 29% this Monday vs last
CTR: down 43%
Clicks: Unchanged
CPC: Unchanged
Avg Position: Unchanged
New Accounts (our end goal): Unchanged
Acquisition Cost: up 3%
To me it looks like Google is just serving more impressions to the same number of people, but that it is not affecting my campaigns' performance.
Impressions: up 20%
CTR: up 20%
Clicks: up 45%
CPC: Same
ROI: up 5% (certainly within margin of error - but I'm confident it at least hasn't gone down)
Can't say for sure - but I suspect the increases are at least partly due to the new layout.
My theory is that since there are more ads / page (haven't counted them - but I'm sure someone has) - people are more likely to have an adword served to them that appeals to them and generates a click. Not to mention them looking more like real search results.
If the trial period resulted in fewer adwords clicks total - I doubt they would've implemented the changes.
This doesn't mean everyone will benefit though - I suspect ads in lower positions will benefit (since they have a better shot at being on the first page), and higher ranked ads may get hurt (since they have more competition).
My theory is that since there are more ads / page (haven't counted them - but I'm sure someone has) - people are more likely to have an adword served to them that appeals to them and generates a click.