Is boost optimized to use variadic templates from C++11?

I can not find information on (1) whether Boost is already available in a version using variadic templates from C++11 instead of using MPL and (2) what kind of compile time reduction one might expect when making "typical" use of common Boost idioms (ptr, tuple, pair, mutex, etc.) on common platforms (MSVC 2013, clang, gcc). Thanks!