Racing at the front i think is alot more competative, they are driving more to the limits of the car and they are bound to slip up, also i think there is higher expectations at the front, if you in the middle and divebomb down the inside at a silly place most people at the front will just shut the door on you. e.g today on CTRA Race 1 i was in 2nd or 3rd and i got a bad exit leading onto the straight so had some XFG up my ass, he gets beside the trys to pull across onto my line nudging me, so i thought, dude if you wana do that you can suffer the consiquences, i wasn't backing off so i just stayed there which he did a PIT manouver on himself
So yeah, some people might not be able to cut it at the front because most of the guys there are alot more experienced in racing itself and with driving a car on the limit, so you will get swamped, so when your comfortable in the middle pack, your not ready for the front, when you make your way to the front and think you can battle with these guys then go ahead, move up. This is why we have packs in races for different experience levels and abilitys, they aint there for nothing.