The University of Virginia does.
They survey students every year to find out what they're up to tech-wise. Apparently 99% of their first year students own computers.
And, a large majority of those computers are laptops (3058/3113 or 98%).
And, what's on those laptops? Let's have a drum roll:
60% have Windows VISTA
26% have Mac OS X
12% have Windows XP
and, 2% or less have something else - like Linux.
This is why I really, really, want good web-based applications.
Just for the record, I don't care what operating systems students use. My concern how to help them use those computers to do biology.
Hat tip to Wired Campus.