What do you mean? I say they're both very, very fast, but I think Varnish might be a bit faster (or better written). In any case, it's a really close call, and you should use the right tool for the job, as they aren't both written for the same job.
I think he means that you should read the first sentence of your original post again.
Ah, I meant "than nginx". The weird thing is that I read it again after the comment. I can't edit it now, unfortunately...
It's clear from his post that he found varnish to be faster.
Unless you subscribe to the concept of case sensitivity, that is.