Mindcraft's tests had claimed NT outperformed Linux as a file server by 2.5 times and as a Web server by 3.7 times. PC Week, bless 'em, doesn't seem to draw attention to the point, but its Labs results come up with NT being 2.3 times faster as a Web server (IIS 4.0 versus Apache) and around about the same as a file server. They also found that Linux performance didn't collapse when client load exceeded 16 computers, as Mindcraft's Apache benchmark had found, and the performance difference was a lot narrower on a single CPU box, although NT still won.
[...] PC Week also reports that the lack of a multithreaded IP stack in the Linux networking subsystem causes a performance plateau in the OS, and the charts in the report are particularly interesting. They show fairly conclusively that Linux was barely able to take advantage of multiprocessor boxes at all, so this is a hill the OS needs to climb soon. PC Week Labs Report.