Wow, I can't believe I've never heard of them mentioned before, and even wikipedia is vague (more than usual), I'll be sure to ask about it, thanks.
So I only had time to hear about game technology and it sounded really, really good. I asked about maths and while there is no module specifically for it, it is taught as part of other ones, including the 2nd-year simulation module.
They showed us a part of a video of this years graduate's group project (their third year)
which (from the impression I got) was done without any game engines, using C++, but I may be wrong.
I asked about Graphics API's and she said it depends, but that she prefers OpenGL which I thought was awesome.
It looks like we'll have access to Unity and UDK for our first (and second?) year, with a heavy focus on C++ and C# on the odd occasion (XBOX development, etc)
The teacher that gave the demonstration (Carina McLane) seemed really approachable and knowledgeable, even having worked in the games industry, the downside is that there are only 60 (absolute maximum) positions available, which was really surprising as I always assumed there would be 100's for every course.
I asked a Year 1 CS student about electives and they said the only thing similar to that is in Year 3 where you get to pick from different modules.
Next year I'll check out CS, but Games Technology was way, way above my expectations of it.