This would benefit from a comparison with current OpenMP/OpenACC (which supports offloading to attached processors in a standard way for C and Fortran, at least

This would benefit from a comparison with current OpenMP/OpenACC (which supports offloading to attached processors in a standard way for C and Fortran, at least). Also, comparing with gcc 4.2 in the performance examples doesn't seem very useful; it didn't support AVX, regardless of auto-vectorization. (That's not meant to dismiss ISPC.)