The early NSX is faster at higher speed than it is at lower speed, as a result of its gearing. The NSX is going to be closer 100-150 than it is 0-100.
Your braking comment is also interesting, given that the US Model E46 M3 got relatively sub-par brakes that warp frequently at track events. It should have come from the factory with the superior Euro two-piece floating rotors that many people retrofit and were standard on the Competition Package M3.
Certainly, the early NSX could benefit from upgraded brakes, but you may want to take a look at a recent poll thread from folks who track their NSXs frequently on the subject of the adequacy of the stock brakes.
http://www.nsxprime.com/forums/showthread.php?t=51013
As for owners getting defensive, perhaps using words like 'demolish' has caused them to feel that way? The words we choose are important.
BTW, Mystic Blue is a great color, particularly with a Cinnamon interior.