I don't mind sharing my experiences really, are saying where I think I'm gaining time. For instance, I surprised how late you can brake after the 1/4 mile straight where the drag rooms do their racing. The more competition the merrier, door to door racing, side by side through a whole lap is what I live for in racing games.
From the few laps I had with other cars, the straight line speed isn't as bad as you'd think, I was able to gain in the draft too. It also helps when you can get a good exit on to the final straight, I think my apex speed averaged around 73-74mph on the final sharp turn but it's difficult to get the line just right.