Kelmac
No one will out run me in Arcade mode with the Traction Control turned off!
Anyways...I would like to thank Flying Dane for answering the question!!
A bold claim indeed, now I have no way of knowing how good you are. the best way I know of seeing how you fair against the really fast members (of which I am not one) is to register and enter the On-Line Racing series.
A lot of the top members in the OLR series run without any driver aids, so would be the ideal place to start.
Kelmac
Pick rear wheel drive cars from you own garage with no traction control and go for it then you'll see what we're talking about.
I just ran a Cerbera Speed 12 (about the most extreme RWD I could think of) in both two player and normal arcade, no driver aids at all and N2 tyres just for fun.
The level of traction is not noticable different from running the car in GT mode with all the driver aids set to 0.
Kelmac
Also go to the professional or extreme league nurburgring races turn off all driving aids and let me know how you fair!!
Kelmac!
I're raced in both leagues on the 'ring and beaten them with no driver aids, its more than possiable, and as I said above I'm not one of the fastest.
If you can modulate the throttle you do not need TCS, its just a case gradually applying the throttle rather than going straight to wide open throttle.
Please be aware that my comments are based on my exerience with GT4 and from comments posted by others. I am, personally, far quicker without driver aids than with them, I also find I enjoy driving more like this.
However, I know that its not the same for everyone. I have no problem with your comments that you find you are quicker when using Traction Control; so I find it hard to understand why you don't seem to believe that others can be quicker without them.
It just down to personally preference, not worth getting worked up about.
Regards
Scaff