We ran a short developer survey with BlogGeek.me a couple weeks ago (see this post). We received 97 respondents as of last Friday, August 1. Tsahi randomly selected 3 winners – he has contacted them already so if you did not get his email we are sorry to say you did not win 2 free ebooks. However, you are still eligible for a 20% discount, and should have received an email with instructions with coupon codes.
97 respondents certainly is not a statistically valid sample size from a pool of thousands of active WebRTC developers (maybe more), but there several useful data points we can extract from the data.