I’ve done a quick run with the Page Benchmarker Extension on chromium to measure the difference between http and SPDY + push. Enabling benchmarks restricts chromium to SPDY draft 2 so we’ll run without flow control.
Note that the website is not the fastest (in fact it’s pretty slow). But if these results will prove themselves valid in real benchmarks than a reduced latency of ~473ms is pretty awesome.
Here’s the promising result:

I’ve done several iterations of this benchmark test with ten runs each. The advantage of spdy was always between 350-550ms.
Disclaimer: This is in no way a representative benchmark. This has neither been run in an isolated test environment, nor is webtide.com the right website to do such benchmarks! This is just a promising result, nothing more. We’ll do proper benchmarking soon, I promise.