That's what I mean, the aerodynamic effect created by F1 spoilers/rear bumpers is so complicated that the drafting effect will not show up.
Yes it will in the real world. Slipstreaming is a very real issue, that has a lot of collisions (and overtakings) on its resume.
I'm just asking do you feel this in the game?
In all fairness, GT5 is a racing game (shoot me for not calling it a sim) If you want to feel everything, you need a real simulator. If you want a true F1 feeling, GT5 isn't really an option.
On the other hand, Bernie has been trying to make overtaking(isn't he?) easier and we see much different spoilers comparing to 4 or 5 years ago.
As long as driver safety has number one priority hands down, then it will be hard to make it much more friendly to overtaking than it is at the moment. (And it should ALWAYS be #1). In a few years, and many more billion of $, and engineers with no limitations, we could have cars being so fast that the human racers can't follow anymore. Most of the changes has come to give better safety somehow, and then some "counter meassures" to make it interesting again. If I remember correctly, there will be introduced turbos again in 2 years or so.