Thomas Crampton at Social Media Today conducted a very interesting study with the following deduction:

I think it is a very interesting concept that I tend to agree with.  I follow mostly subject matter experts (SMEs) on Twitter with several of my “real life friends” (for lack of a better word) and mostly friends on Facebook.  I don’t focus at all on thought leadership or building expertise on Facebook either which further supports this conclusion.

It is definitely worth reading!

Note: The study’s conclusions are from video links which isn’t entirely representative, but I do agree with the findings.