mention pyrosetta stats
diff --git a/docs/intro.rst b/docs/intro.rst
index af35db9..8ad8acb 100644
--- a/docs/intro.rst
+++ b/docs/intro.rst
@@ -68,8 +68,12 @@
- Everything is contained in just a few header files; there is no need to link
against any additional libraries.
-- Binaries are generally smaller by a factor of 2 or more compared to
- equivalent bindings generated by Boost.Python.
+- Binaries are generally smaller by a factor of at least 2 compared to
+ equivalent bindings generated by Boost.Python. A recent pybind11 conversion
+ of `PyRosetta`_, an enourmous Boot.Python binding project, reported a binary
+ size reduction of **5.4x** and compile time reduction by **5.8x**.
+
+.. _PyRosetta: http://graylab.jhu.edu/RosettaCon2016/PyRosetta-4.pdf
- When supported by the compiler, two new C++14 features (relaxed constexpr and
return value deduction) are used to precompute function signatures at compile