[wbond]

Let me rephrase then:

Don't even bother building nginx 1.4 with spdy support or configuring it since no one can use it. From May 2013 until now there was a benefit to end-users. There no longer is.

If you want to provide the speed benefits of spdy to users, you now need to run unstable nginx or mod_spdy.

[unethical_ban]

Right. I think the point is that you shouldn't be relying on experimental standards for one's web architecture unless you recognize its experimental status.