You're not on a super-fast connection. You're on an asymetric connection: super-fast download, to fill your brain with standard formating data, and super-slow upload, to limit the influence you may have on the other people.<p>The internet has not be designed as an asymetrical or a star-topology network. What you are connecting with usual ISP, is not to the internet, but to the ISP network: a big star network, with the ISP computers and routers at the central point, controlling your packets, and you at the tip of the branches, able to download fast what they want to feed you. They don't let you send anything fast, providing just the bandwidth to send back the ack packets.<p>On the other hand, routing amongst billions of networks is not a solved problem yet, it would be quite difficult to implement a meshed network (where you'd connect not with an ISP, but with your neighbors), and where every LAN would be assigned an ASN...
Can't even login now, if you look at the javascript console in Chrome/FF you'll see the server giving 500 errors. Looks like they under-anticipated the demand...