It turns out (just read an article in Russian) that recently there was a huge DDOS attack (100+ Gbit/s) that dropped major providers in Europe, DARPA(.mil), major Russian search engine. 100GBit/s is enough to fill major landlines and backbones (even in US, darpa.mil failed too). That might have been the cause of delays. Nobody is sure whether the attack is over, but major datacenters and DDOS protection providers failed to do anything against it.

Still, making your site independent with async scripts is good idea.