If I'm guessing what the names of your Pingdom checks mean correctly, they seem to show CloudFlare making your response time 10ms slower. I'm assuming that cdnjs.cloudflare.com is the site with CF in front, and cdnjs.com is without, not sure if that's correct.
Looking at the headers both are being served by CloudFlare. And cdnjs.cloudflare.com is being redirected to cdnjs.com. So, I suspect that that's where the extra time comes from.
http://blog.cloudflare.com/cdnjs-community-moderated-javascr... https://www.cloudflare.com/apps/cdnjs
As for Cloudflare's speed, you can see cdnjs's average ping time as measured by pingdom here: http://stats.pingdom.com/4jg86a2wqei0/362854