Interesting numbers from within Apple on use of Apple hardware. The $/gig for that new RAID array seem pretty decent, not to mention the fact that it has been certified for XP and Linux, in addition to Apple's OS.
He [Apple senior IT director Dean Rally] also made the case that less administration is needed for Macs, pointing out that the company has just 27 IT workers on its help desk. That's one help desk person for each 433 employees, about half to a quarter of what research firm Gartner estimates are needed by typical corporations.
Given that a significant proportion of those employees are developing the operating system in question, that may not be a particularly useful statistic.