I have something to say after reading here to decide what to do this year about FSR (I would like to join).
Mmm... and you are comparing in your video two cars in same conditions with two real cars that can be in totally different paces. I'm sure the front car is way slower or has worse tire wear. Real video posted by David is more clear about that, and shows how a driver avoid dirty air if It's in a similar pace, and what happens when he does not.
Maybe David demonstration in rF2 does not show two cars in the same pace, but, shows how real F1 drivers behave, and you can see It in every race, if they are in the same pace they lose lot of time in fast corners, or they can maintain distances slowing a bit against a slower car to attack later in straight and next turn.
If you are saying a real F1 car can maintain the thottle down at less than 20-15 metters in that turn against a car with same pace in that Silverstone turn... I will say you are wrong for sure.
PS: and hey! I do not like OW more than GTs... I love GTs way more, because of his style, if someone want to race with GT style, go race GT1 class and that stuff, even in those cars is really hard to overtake if both have the similar pace and you do not play with edited pillow/overtake-ready cars.