To those in the UK with these problems, get yourself to that Genius bar and get a free repair. My 2010 MacBook Pro 15" which I still use, had the dreaded Nvidia GPU fault, it worked fine for over 3 years?? Anyway I went to the Apple store not expecting the best as it was over 3 years old, and they confirmed the computer WAS affected by a faulty Nvidia GPU and they replaced the logic board totally free there and then, well I went round the shops for 3 hours and then went and picked it up.
I was advised that under EU legislation as the product was faulty at point of sale, they HAVE to repair the fault free of charge.
And I have to say I had a couple of GPU glitches after but touch wood it's been fine for a while now, I don't expect anymore issues hopefully. Which is just as well as it's my only computer and I don't have the cash for a new one, would need to save up.
Now if I was in America and Apple would not repair the fault knowing in Europe they have to then I too would be very very annoyed.
And as the Genius bar guy said, Apple's products are only as good as their supplied components, which is true as you wouldn't expect AMD or Nvidia to churn out thousands of faulty GPU's but there you go..