Update: Google’s Matt Cutts has confirmed that Google is indexing the comments (see below).
Some tests show however that not every comment is being indexed. So far we can see that the profiles that are indexed at least have to be open to the public and permit subscriptions. But even then not every comment is indexed.
Labnol gives the example of a comment by Robert Scoble which indeed can be found in the SERPS:
If we start trying it out on other comments however it doesn’t always add up. It seems as if the commenter at least has to have a public profile.
This comment for example is indexed:
But a comment with a similar profile doesn’t:
A search through TechCrunch using Google does show us that many comments from Scoble have been indexed:
The social profile element
The fact that we are seeing them in the SERPS has another meaning. It doesn’t just have an impact on the visibility we can create, it also has an impact on Google’s Social Profiles.
Google gets another set of data which can help them define what we do and like, which will help them improve our social profile so they can give us even more personally based content.
So can we conclude that Google is now indexing Facebook Comments? Yes, they are. But it is not clear which ones they are indexing.
We know that it is not just TechCrunch, because we see them on other blogs also. We also know that at least the profile has to be open, but how ‘powerful’ the account is might just also play a role. We are not sure yet.
I would say don’t go running to sites with Facebook comments and spam them to bits. It might be a slower roll out, it also might be related to something else.
Matt Cutts yesterday confirmed that Google now indeed has the ability to execute AJAX/JS to index some dynamic comments: