I often forget you all do not have Beyond the Apex.I don't know how many he has. But he's certainly well-placed to know how the real thing handles and how the GT5P one stacks up... Unlike almost everyone else.
Its like driving on ice.
I think the main problem with the ford GT is that it responds the worst to PD's insane default tuning of - everything set to the middle - most other cars in the game are at least manageable with this setup but the GT needs a radical retune just to stay on the road. Once you've found the sweet spot, however, it rocks!
You have to go easy on the throttle on corner exits but when it bites it'll throw you out of that bend faster than anything else and it's one of the most rewarding cars in the game for me, simply because to drive it fast requires mastery, unlike a lot of the cars where pointing it the right way and flooring the accelerator will usually do the job.
The GT does seem to act strangely in constant radius long sweepers where it will begin to bring the tail out even with a painstakingly constant throttle. The oversteer component in the physics has just been overdone IMO for the RWD cars. Better than GT4 yes, but too far the other way. AWD cars on the other hand, and I own a 2008 TT, are much too forgiving in the way the physics are currently. Some middle ground is needed.
The GT does seem to act strangely in constant radius long sweepers where it will begin to bring the tail out even with a painstakingly constant throttle. The oversteer component in the physics has just been overdone IMO for the RWD cars.
There is no "oversteer component" in the physics in Gran Turismo. If it had a physics model as simple as that, it'd be GTA 1 not GT 5. If you do not believe me, take a look at an open source racing simulator like TORCS or racer.nl -- even these hobbyist efforts have never comprised something as simplistic as an "oversteer component".
GT is evaluating all forces affecting individual tire traction (probably even down to chassis torsion). When the tire slips, it slips. There is no "oh he lifted the throttle while cornering so I'm going to oversteer now" or "he's too fast so the rear has to step out" logic buried in the simulation. It follows from accurate modelling of physical forces.
Regarding the high-speed cornering MR oversteer: constant throttle does not mean you're safe. Depending on your speed and turning angle, constant throttle can mean acceleration or even deceleration, both of which can unsettle your car, along with road surface imperfections and aerodynamic problems. The GT does not generate a sufficient amount of downforce to keep the rear stable in high-speed corners. For example, the long left-hander after the esses in Suzuka demands all your attention if you want to take it at full throttle (partly due to the fact that the bend goes over a crest, too). Now try this bend full throttle in a quick-tuned NSX-R, a very similar car but with even less rear downforce. Have fun!