Ok, well how about wikipedia
"Although the car does have a Guinness World Records certificate, many people still find it hard to believe that the SSC Ultimate Aero topped the Bugatti Veyron on maximum speed. One of the reasons is that this car was never seen on camera, under credible circumstances, reaching the claimed top speed, unlike the Bugatti Veyron. Other reasons are the place where the top speed was reached (road instead of dedicated race track), and the car weight data, that according to some do not seem credible or even feasible.
Jeremy Clarkson said that the test driver was "a 71 year old man", and that he does not believe that the car really is better than the Bugatti Veyron.
Some critics do admit the possibility that the car does indeed live up to the Guinness World of Records certificate, but that does not in any way mean the car is better than the Veyron. They claim that the Veyron was designed to be a normal german sportscar (you can get it to the supermarket, and beat a world record on your way home), with all the luxury, elegance, safety and reliability, that the SSC Ultimate Aero does not have.
Others say that the SSC Ultimate Aero isn't the fastest street-legal road car, because that place belongs to the Koenigsegg CCX.
In spite of all doubts and criticisms and the way these are qualified, it is true however that the SSC Ultimate Aero has never been shown on camera and under credible circumstances (such as having its speed measured by a GPS tachometer) reaching the claimed speed."
No matter how you look at it the bugatti is proven. It may not have been in two directions but it has been done.