Ads on the page aren't the same thing as ads interspersed with the results. The ads used to be in a sidebar, or in an inset with a different background color that appeared above all results.
Read your own link:
> For example, entering the query "buy domain" into the search box on Google’s home page produces search results and an AdWords text advertisement that appears to the right of Google’s search results
> Google’s quick-loading AdWords text ads appear to the right of the Google search results and are highlighted as sponsored links, clearly separate from the search results. Google’s premium sponsorship ads will continue to appear at the top of the search results page.
Read your own link:
> For example, entering the query "buy domain" into the search box on Google’s home page produces search results and an AdWords text advertisement that appears to the right of Google’s search results
> Google’s quick-loading AdWords text ads appear to the right of the Google search results and are highlighted as sponsored links, clearly separate from the search results. Google’s premium sponsorship ads will continue to appear at the top of the search results page.