Agreed, Linux is quite popular in academia, particularly in any technical field. A lot of scientific software has to run on Linux because of supercomputers, and especially a lot of open source software is Linux only. So a lot of students run Linux for convenience, and a lot of computer labs run Linux as well. Of course, there’s also the fact that lots of people just think Linux is better than the alternatives, and they’re more likely to try new things when they’re at a university student’s age.
So I feel like that would probably be a significant contribution to the 2% that’s being reported