Yes - I should have made that clearer in the blog post I guess - PhoneGap is now equal to Ejecta on all our performance benchmarks, not just that one. It makes sense because they both are currently GPU accelerated but not JIT-compiled. WKWebView adds JIT compilation so will allow PhoneGap to pull way ahead of Ejecta, instead of simply being equal.
Ah yes, this is so awesome. Also people seem to upgrade to iOS 8 even faster than 7. This is really, really good news.