It may not be entirely accurate; I can only go by the complaints I hear from my Chinese friends, and my limited experience with CloudFlare-enabled websites when I'm in China for short stays. However it definitely has significant impact for Chinese users.

I see you have big plans for China :) Looking forward to seeing your new data centers coming online. How do you plan to solve the mandatory ICP Registration problem for your customers?

There are plenty of cloudflare IPs that are blocked. Is cloudflare aware of this? A few were being used for cdnjs which causes problems for anyone using cdnjs.