Zack (not Shak)
Typically Google will help you group keywords for easier setup, encourage creative grouping, suggest new keywords, etc.. They might send you some free goodies too:) They can help get things past editorial for faster syndication. Performance and optimization is still 100% up to you as far as ROI goes. Maybe with the new conversion tracking tool they may take on some of that role too, never know.
If you have a new campaign all set to go, you can probably get it live on Google faster than a rep will, since they deal with so many accounts.