I've tried the NTM1.1 on the following:
Ford GT, Corvette, SRF, MX5 Cup and MX5 Roadster.
I am pretty impressed with the NTM so far, and think it is a big step forward! (from a roadies perspective)
There is still known issues such as the tyres do need to be run with higher pressures than real wolrd setup (although this has been improved greatly over the last version) so that might be why the FFB feels more dead to some
On the NTM I run about 30-40% more FFB as well, what level are u guys running your FFB?