I am doing a PhD at a prestigious university. I did really badly in most of this and in for the first two tasks I didn't really even understand the instructions.
I did ok in the emotional recognition and verbal comprehension. I also did surprisingly well in the rotation section which I normally find hard. As others have said, it was fairly easy because I just looked at the colour patterns, I didn't rotate the image in my head at all.
There are so many things that are annoying about this test (apart from the fact I did badly!). Why on earth is the tower test anything to do with intelligence? I'm fairly sure I could learn it if I thought it was in any way useful for my life. The thing I find most annoying is the silly, smug, twee, cosy, ridiculous title 'Great British.'