Am I missing their explanation of how a SPDY-capable client and server discover and make use of SPDY instead of HTTP? For this to take hold in the wild, it has to be possible for me to run a combined HTTP+SPDY server, and for a client connecting to it to automatically make use of SPDY if it is capable. This must happen without user intervention (i.e. we don't expect people to type spdy:// instead of http:// ). It see…
You can already do this with Flash today, and it would be much easier for Google to push it into the DOM than to touch the transport protocol.