Not half, but a lot. I think more or less 30 of the 600.Also, get back to us on the microtransactions of the game.
In Forza 6, I heard that HALF of the games cars were behind a paywall.
In this case, I wouldn't be surprised if you've already downloaded every single car in the game, but you have to pay $$$ to access them... because of 'convenience.'
Every month there is a car pack with one free car and others paid. I don't have a problem with DLC because there's always something free and most cars are useless anyway. The Ferrari F360 CS destroys the game alone.
My main problem are the expansions. People who bought the ultimate edition don't get any expansion, just cars.