Most university philosophy departments in the US focus on logic, analytic philosophy, philosophy of science, cognitive science, etc, etc. I can't even think of a single philosopher at my university's department who would have done anything but chuckle at post-modernism. In fact, it was a philosophy prof who told me about the book "Fashionable Nonsense".

From the article:

"Outside France, the dominant philosophical school was analytic philosophy. A broad church, its foundations had initially been articulated by, among others, Bertrand Russell, GE Moore and the early works of Wittgenstein. Founded on the notion of conceptual clarity, analytic philosophy (in its crudest form) regards philosophy as a branch of the sciences, often subservient to the natural sciences, or at best continuous with them. It proposes that through the logical analysis of philosophical propositions, the basic questions of existence can be clarified, and possibly solved."

So why would you generalize all philosophers into the bucket of post-modernism? Many of the founders of modern analytic philosophy were mathematicians: Russell, Frege, Whitehead, Peirce, etc.