Can the thread per request model be faster than non-blocking I/O?

Question

I remember 2 or 3 years ago reading a couple articles where people claimed that modern threading libraries were getting so good that thread-per-request servers would not only be

Answer 1

Some time ago I found rather interesting presentation providing some insight on "why old thread-per-client model is better". There are even measurements. However I'm still thinking it through. In my opinion the best answer to this question is "it depends" because most (if not all) engineering decisions are trade offs.