There are a few things going around the forums here and at iRacing. People either love the NTM or think it's trash... I for one think it feels just about right to be honest. People are talking about the "snap" effect when you try to catch a spin (this happens in real life) but are not taking in consideration when they see it on TV they are watching professional drivers who have probably been driving since they were kids. Therefore it looks easy and doesn't happen so the iRacing cars shouldn't do it. The other problems such as the tire temps, tire pressures, and other types of various problems I'm sure will be addressed soon.
I'll be honest in my opinion about the Ford GT as I have not driven the LMP more than a lap or two max. I find it to be as easy to drive as the MX-5 if you drive it correct. This is not a car that likes to go into a corner under braking!!!! If you do it you had better be trail braking correctly or you will go sliding, that in turn will lead to a horrible next corner unless there is a long straight for the tires to cool. I have said it before so I suppose once more will not hurt. Slow down!!! Get your brake points figured out for the track you are running and if you can get your braking and downshifting done before the turn you will be golden. Make your turn without the brakes at all, and if need be coast through the turn. If you must use the brake, touch them ever so lightly. I mean just a tiny bit is all it will take, plus doing this will not induce a slide. The next rule of thumb I have found with the GT is to be easy with the throtle. What I mean by that is say you are mid corner and holding your apex and it's time to start accelerating from 0% throtle to 100% throtle should take you about 3 1/2 seconds to complete and then you will get out of the corner at top speed. Dont get on the gas too fast or I promise you will spin it if you are turning too hard, or it will have horrible understeer. Please keep in mind this is corner by corner but you should get the meaning and point. Also keep this in mind, the GT weights almost 4,000 pounds if I'm not mistaken. It's not an F1 car with perfect cornering.
However what Will stated above is true. All cars will be getting the new tire model very soon from what we are told. Taking this into consideration will show that if you get use to the driving style that it takes to drive the OTM (sliding to be fast), you will only be hurting yourself as you will have to learn to drive all over again. Now I'm not saying that we shouldn't have other races by any means but alot of other sims have taught really bad habbits as far as how you would drive a real car. Also if you want to drive the lower end cars we have MX-5 league starting up soon so don't hold yourself back by not learning the faster cars. We have GOOD things coming for all!!!!