thats cool, if she can do it, she should be there
this kinda doesnt happen here, you get the odd one, but i think its rather rare. its almost reverse on our course, theres a lot of people 2-3 older than me because they did foundation years instead of A-levels prior to coming. and we have 3 guys who are married with kids and in their 30's learning mechanical engineering! gary is the lucky one though, he works for perkins, and they sent him on this degree to become a engineer (by degree) so they pay all his tuition.
i'd think someone that young would be intimidated coming here, specially in halls, knowing that at 16 your not really allowed to legally drink beer, whilst all the other freshers (who are 18) can.
in the US its either too easy at uni (hence lots of smart people going early) or the teaching is so effective in the grades leading up to college that many get good enough to be at university.