Rich Snippets for recipe pages not appearing in Google

[bakepedia]

We are building a baking website and have implemented rich snippets for our recipe posts. We noticed inconsistent results on competitor sites, and then noticed it was happening to our links as well. Our content has only been live for a week, I know it may take a couple weeks, but other sites that have had their content around for a while have this happening too. For example:

When you use this tool: http://www.google.com/webmasters/tools/richsnippets And put in this link (competitor): http://food52.com/recipes/864-deep-chocolate-cake-with-orange-icing and press "Preview," you'll see a nice rich snippet preview.

Now go ahead and search for "Deep Chocolate Cake with Orange Icing" using Google, you will see that in the search results the image for this link is not appearing. This is happening to all of our links as well. Why?

We are using the schema recipe format, but apparently that doesn't guarantee the image will appear in the actual search results. How does Google determine which images are displayed in rich snippets and which aren't?

[BCutrer]

Having the rich snippet is not a guarantee Google will use the information. We see that all the time especially with author tags. Providing the information to Google is just telling them it's available, as they tweak their results it tends to move around a lot. It sound like you checked webmaster tools to see how your mark up is perceived with Google.