I found both posts informative, and yet I'm with cbetz on this one. The issue isn't whether Matt's first post was informative but is instead whether it was fair|wise|necessary to say "Nginx sucks at SSL" instead of, say, "My initial testing, which needs to be investigated further, is showing Nginx SSL performance lower than other alternatives." The first headline is more likely to grab folks' attention, which is probably why Matt chose that headline. It is probably that choice that cbetz finds objectionable, and if so, I agree with him.
My point was that you seemed to have purposely made that 'headline' that you thought he should have used needlessly verbose, to the point where it couldn't be considered a headline.