Here is from Jakub Narebski who is again running "Git User's Survey" this year for us.
The Git User's Survey 2011 is now up! Please devote a few minutes of
your time to fill out the simple questionnaire; it'll help the Git
community understand your needs, what you like about Git (and what you
don't), and overall help us improve it.
The survey will be open from 5 September till 3 October 2011.
The results will be published at GitSurvey2011 page on Git Wiki.