It's obvious the ride system for Test Track can result in some amazing attractions (see Carsland), but the actual Test Track ride has always been a complete snore to me. Possibly because Disney has always gone out of their way to market how fast the ride is, as if it's this thrilling expereince. Instead it just feels like your driving on the highway (and for about 30 seconds)...I drove faster on I-4, on my way to Epcot, then I did on Test Track.
If they want to "Thrill me" make the car go at least 100.
They also tease the stupid wall test a bunch of times, and it never lives up to that tease either. The whole ride is full of "gotcha" type moments that are incredibly cheesy and treat the rider like they are a trained monkey...or an actual crash dummy.