I had some of the old designed ads on Jan’s Group Home Support alternating with the new ones. The old style ads weren’t targeted. I wrote Google about it, and this was their reply:
Hi Jan,
Thanks for your email. It appears that all your pages are now displaying the new ad format.
Please keep in mind that until we’re able to index your web pages, we may display non-paying public service ads or less targeted ads.
Because crawling is done automatically by our bots, we can’t control how often your pages are indexed. When you first place the Google code on a page that hasn’t been crawled, our crawlers typically index it within 30 minutes, though occasionally it may take 48 hours or longer. When you update a page, it may be 1 or 2 weeks before the changes are reflected in our index. Until then, we may display less relevant or non-paying public service ads. You should expect your ad relevance to increase over time.
If your ad targeting hasn’t improved after this period of time, feel free to reply and let me know. Thanks for your patience and understanding.
Sincerely,
Sean
The Google AdSense Team