I have a friend that races boats and he's always reminding me that while we can adjust the surface we run on to fit the scale of our toy cars, there is no way to scale waves on water. I think the same applies to things like air resistance, inertia, and surface friction so it's really a bit more complicated than it sounds. When you consider the fact that it takes a very specialized 1:1 car to run 450 mph in a straight line then watch a 10th scale sedan running a sweeper at 40 or so actual mph like it's just another day on the track, it's easy to understand the huge differences between sale models and the real thing. It sure is cool to be able to simply slap an extra zero on the right hand side of your actual speed though. The simple fact that we have toys that off the shelf will run in excess of 50 actual mph is still nothing short of amazing when you compare that to what was happening just 4 years ago, and would have been laughed at as impossible ten years ago.