Really? I wouldn't. I'd feel kind of good about working for a company that, in addition to the large amount of software donations they make year-round to charitable nonprofits (Windows for a $12 administration fee to the organization that distributes them, Office for $23?) is offering deep discounts on Windows and 'making more than 12 million copies of Office available to students for free at qualifying institutions' (from the first link in the summary).
Yeah, it's only software, but it's the latest full-featured version of useful software that Microsoft has no reason other than generosity (and yes, PR) to discount or give away. And Apple may be donating hardware, but realistically, what else do they have to offer that's of much use to schools if it doesn't come with Apple hardware?
Note: I have never worked for Microsoft, but I do work for a charitable nonprofit.