It seems that Google is rolling out a change to Google AdWords that sees 4 ads at the top of the search results, none on the sidebar at all, and an additional 3 ads at the bottom of the search results. This replaces the usual mix of top, bottom and sidebar-heavy AdWords ads, depending on the specific search result.
Many of the ads do have additional features like sitelinks, but it is hard to tell if those have increased or not.
It was huge news in December when Google began testing 4 ads at the top of the search results, and quite a controversial one for many. While advertisers loved it, regular SEOs weren’t so happy since it pushed the organic search results even further down the page.
AdWords hasn’t confirmed it publicly yet, but multiple advertisers are confirming this is what their AdWords reps are telling them.