That's really what these benchmarks should be about, is are there speed differences with different kernels, and how does different software compare. On the Mac tests, were they using completely different libraries or were they similar or the same. It's just really really hard to do any kind of fair comparisons, and harder to try to find out what is causing the performance differences. Those are the things that are fun to look at for me.
But, Phoronix still does good by pointing out the end results of everything put together in these software bundles aka distrobutions. That's "real world". But if there are different libraries or software users can switch to that are faster or whatnot, those things should be noted, since you should be able to install whatever the hell you want on your computer.
