Yep, RedHat Linux 6.1... the server isn't a total monster (750mhz, 256mb ram, 9gb SCSI), but it's more than adequate since we have an entire server and it's not shared ... We have such a huge db load, so we went with the SCSI drive, which contributes to the speed. Also, everything is done in PERL with a MySQL backend ... which is about the fastest combo we can find ... PHP would probably be very similar in speed, but what wears PHP down usually is how many extra calls people make (referring to some PHP forums out there /w3tcompact/icons/wink.gif).
And you're right ... I can't think of a quicker site online. /w3tcompact/icons/grin.gif