This is where I worked last, as an employment recruiter. So great to see they've done this, even if it is Ubuntu!
Edit: I've just spoken with them up front again, and the guy told me that the computers are on older hardware, and they don't have the funding to get new computers, so this was the alternative, since Linux is backwards compatible - they don't have to do anything further. He also said their IT guy likes Linux.
I second that