Digg comment backlink

i posted a comment on digg last week and included a link to my site as a source for the information. Doing a site: check in google i now see the url of the page on digg i made the comment. Does this mean that google is already picking up this backlink and are digg backlinks worth much in general seo terms?

 

Get you more and more backlinks and your site will have
better result than the comment backlink....