Every CPU vendor seems to make BLAS libraries that are specialized to run on their hardware. Do they do the same for LAPACK? Or is that a non-issue because LAPACK is written entirely in terms of BLAS library calls? 
Do vendors release their own LAPACK library?
lapack;blas
Vendor BLAS like Intel's MKL or AMD's ACML, and even GotoBLAS (now OpenBLAS) provide tuned versions of a tiny subset of Lapack, like linear solvers and least squares solvers. I imagine this is only because these routines are among the most commonly used in Lapack. Besides this, I think there might also be routines for eigensystems and such, but they certainly are not a complete Lapack implementation.