I have a rated page since 10 days ago, and the rating starts are still not showing in SERP.
Google Structured Data Testing Tool is not showing any errors.
Should I wait some more time? How long does Google usually take for the rating stars to show up in SERP?
Below is revalant information found on Google's Webmaster Tools FAQ regarding rich data.
Q: Why doesn't my site show rich snippets?
A: Google does not guarantee that Rich Snippets will show up for search results from a particular site even if structured data is marked up and can be extracted successfully according to the testing tool. Here are some reasons that marked-up pages might not be shown with Rich Snippets:
Q: How long does it take for rich snippets to be visible?
A: Once you've marked up your site's content, Google will discover it the next time we crawl your site (although it may take some time for rich snippets to appear in search results, if we do choose to display rich snippets for your site). If you're marking up your content for rich snippets, you can let us know. Google won't be able to individually reply to your message, but we may use the information you supply to improve our detection and display of marked-up content.
Google claims the quality of site determines if snippets appear or not - even if snippets are implemented correctly.
