No it is not. It is an example of a poorly optimized mod. If one can not race with a realistic grid of 50 cars at practically any course then it can not be considered well optimized. I can't even run it with 40 cars at most courses. It's really not even an issue of the poly (or triangle) count either. The main issue is texture memory usage. They used way too many large texture images which could have been smaller. This is a problem I have seen with several mods lately. The cars look great, they really do, but the texture usage is very inefficient.