Read/Write Web points to some interesting data from Comscore showing that Yahoo! Buzz is surpassing Digg in traffic, engagement, and also has a more balanced demographic.
First, I’d say to never trust just one statistics service, but it is safe to say that it looks like Yahoo! Buzz is a winner thus far in it’s growth and shows what Yahoo! can do with it’s audience when they execute something well. Buzz is probably far from Digg in being a known brand in the “social news” space, but does that matter if you’re introducing social news to the rest of the internet beyond the technology elite?
I tried to get an invite when Yahoo Buzz was in beta, but never could sign up. They did mail me (like everyone does) about notifying when it was open to all, but it has not yet happened. Have not gone back to it afterward, but now I guess I need to check it out and see what improvements if any have been made and how it compares to Digg.