The only real use for matching on CPU and OS is if you're staging in the
binary executable to run as part of the job. Physicists seem to like to
do that; seems to be a peculiarity of that community. We don't see the
same thing to anything like as great an extent among other scientists
and engineers (and we have very little CS in our usage profile, though
if we did I'd expect them to be similar to the physicists). On the other
hand, the physicists seem to prefer to buy their own clusters too.