MacOS10 uses FreeBSD code, but it is Mach at its core, a microkernel based OS. That might explain why the "TCP signals" are slower than Linux. Or it more likely be an example of your typical "poweruser" journalist type who doesn't have a clue what he's talking about except when it comes to things like leet case mods, high technology cooling for overclocking, blah, blah, blah...
Apparently you missed the list of contributors.
Or you just didn't read it altogether.........