Twitter seems to have an opposite opinion: https://blog.twitter.com/2013/cocoaspdy-spdy-for-ios-os-x https://blog.twitter.com/2013/cocoaspdy-spdy-for-ios-os-x

Twitter seems to have an opposite opinion: https://blog.twitter.com/2013/cocoaspdy-spdy-for-ios-os-x https://blog.twitter.com/2013/cocoaspdy-spdy-for-ios-os-x > However, we have measured as much as a 30% decrease in latency in the wild for API requests carried over SPDY relative to those carried over HTTP. > In particular, we’ve observed SPDY helping more as a user’s network conditions get worse.