I personally right foot brake, even with my two pedal DFP, I just throttle blip like I do in my real car. LFB feels so weird and unnatural to me, I honestly can't do it. I could probably teach myself, but I really don't notice that much of a performance difference right foot braking.
When I'm doing rallyx or something though, I will occasionally tap the brakes with my left foot to rotate the car in the corner, not often though, as most of the time, a quick throttle lift does the same thing.