I think most of you would agree that what makes MusclePharm successful is it's brand. Let's face it, supplements are supplements, are all pretty similar, i.e. there is no "miracle" supplement. MSLP is a brand-heavy company.
A few ways to do your own research on a company like this are to check the twitter stats, website ranking, body building ranking, and Google trends for these brands (fitmiss, musclepharm). Since I can't post links here, PM me if you want an email with the links on how to do this yourself.
But, here's some basic stats for you:
Google trends: May already an all time high for MusclePharm. Fitmiss was at 7 in April, down to 6 in May (but it's only May 7). This points to steady increasing search interest on Google, current interest is at an all time high.
Twitter Counter: Musclepharm increased from 161K followers on Feb. 7 to 205K followers today, a 21% increase in 3 months. Fitmiss increased from 9K followers on March 7 to 37K followers today, over 400% increase. In comparison, Optimium Nutrition has just 26K followers, and has had almost no increase at all.
BB: Musclepharm #2, Fitmiss #69 in sales.
Hopefully this helps some do-it-yourselfers out there. If anyone has any other resources they use, I'd be glad to hear them... GLTA!