Alec Saunders points to some severe discrepancies between FaceBook's user numbers and the Comscore's visitor numbers, which have received a good deal of coverage in recent days. He shows why FaceBook's own numbers seem more credible.
I'm not a numbers guy, and I'm trying to stay a bit back from the SAP Global Survey conversation, at least while I'm conducting interviews, but I will say that overwhelmingly, FaceBook has been the most mentioned tool of social media. This includes, generic words, such as "blog" or "online video," as well as brands like "Twitter" or "Technorati." As far as MySpace goes, as it nears registering its 200 millionth user, it seems to be forgotten among those who have joined our conversation.