Doc, the RDX injectors are nothing new and have been well proven in the performance area. The 12 hole vectored design of the injector (not unique to RDX injectors) leads to better atomization which in turns leads to better efficiency and more power from the engine. The proof is in the dyno's, the car is making more power while the A/F ratio remains just about the same. Also, the cost of buying a new RDX injector (~$45) is only marginally higher than an injector cleaning service.
Again this is not unique to the NSX, I showed a 10hp/12tq gain on the Legend, and the K series tuners have been using them for a performance increase 3 years before they even showed up on the NSX scene.
I am currently setting up a fuel injector testing rig to get the dead time and flow rates of the RDX injectors down to the microsecond. I will share this information with Brian at prospeed once it's in stone.
-Matt