Pingdom down

The Pingdom website had problems yesterday already and is down again, does anyone know more? Currently there appears a message from CloudFlare, Error 522,¬†Connection timed out.¬†Are they under attack and tried to block it with CloudFlare or did they use it before already? On Twitter it just says “We are experiencing some issues right now”.

Update: A few days later they are still using CloudFlare, probably their standard setup. Seems to work rather well, the site is loading fast but there is some package loss. No information on the source of their problems.