If somebody faked it, it would make much more sense to fake the results as well so that it looked like the graphics card performed very fast. It would also make more sense to name the graphics card somewhat clearer (HD5870 would be clearer than EG Cypress).
Actually no. If someone were to fake what the driver says the card is and the features but still run the test normally, results would be just as good as with a normal older card. Plus Qaridarium is raving about it not being a fake so it must be. QED.