I think i might have discovered what the problem is, if you are using a wheel that is (mine is a Driving Force Pro). It might not be related to this test in particular, but its a bit strange that i would get a similar problem on this particular test. Maybe its a new bug. It might not even be the game, but the wheel.
I found this test pretty hard myself when i tried it yesterday. My best being a pass of the other 350Z on the start/finish straight, only to loose the lead again for a moment into the first turn. So i should be able to get it without that big of a problem when i tried it again tonight. But no. Starting of i did not reach 4th gear into the first turn, nore into 5, not even coming up towards 11, and i didn't gain that much on the other car either.
Then watching the replay of my lap i discovered that the brakes showed that i they where pressed down about 10% all the time, even when my foot where of the break pedal. On a new run i slowed the car down to walking pace and put the handbrake on, and the car would not move again no mather what i did.
Restarting the game didn't help either. Then i tried unpluging the cord connecting the pedals to the wheel, and i also unpluged the powercord. When i reattached those everything was back to normal.