I agree It's VERY frustrating getting caught up in the bends and lap after lap them gunning it on the straight, v8's are famous for this tactic!

I find alot of the time this is when mistakes are made, you get over the car in front holding you up and getting slower laptimes despite being faster on the straight and doing that all day without moving because they don't want to be overtaken by a smaller less powerful car, so you overtake them on a corner or something.

I've overtaken someone before with this situation then went sideways off the track because I over shot it, I simply made sure I was out of there way and got back on the track after they went past, you just have to be AWARE!