That's the problem with these black-box cloud offerings, that you can never know what will work (or not) and from where. You get semi-random, pseudo-localized outages that are not accounted for in all the 9's of availability.
With a standard TCP/UDP session, it mostly just works or doesn't and you can get a proper traceroute to know what's up. With these fancy CDNs, there's a whole new can of worms to deal with and from a client's perspective you have no clue what's happening because it's all taking place in their private network space where we have no "looking glass".
Fuck the cloud, i want real Internet.