http://www.blogstorm.co.uk/images/google-new-previews.png http://www.blogstorm.co.uk/images/google-new-previews.png It's a large thumbnail where the text isn't

http://www.blogstorm.co.uk/images/google-new-previews.png http://www.blogstorm.co.uk/images/google-new-previews.png It's a large thumbnail where the text isn't legible at all outside of a few select words and the extracted surrounding text. This isn't the same as providing a full-page preview with Google wrapping it in an iframe, for example, to get advertising revenue. People still have to go to your site to read anything outside of the contextual text.