Very good overview of PSR-7 and also contained the interesting history.
Awesome talk, and finally a presentation with the demo inside it, and not the live one :D That's the way to do it :)
One little thing though - I would like to hear something about introducing PHPSpec to existing and complicated project.
Great talk, a lot of comparisons and under-the-hood insight.
One of the best talks of the conference, with real life examples and "theoretical" intro into the story. Slides were really well constructed and the entire talk was really well connected. Great job :)
Nice talk, but I would love some extra examples and best practices for using Varnish.
Great overview of less known features (all the SPL classes) and performance hints of some well known functions. But there could have been a higher contrast on the slides.