this is true that the us based infinty dose get better service but you have to look as to why nissan needed infinti in the first place. Forgien automakers are oly allowed so many cars in America to compeat with the US auto makers. Now Infinti is just a over priced Nissan just as lexus with toyota. just an example
J30= Nissan lepard
Q45= nissan President F-50 and G-50 and the Y-33 chassis is the CIMA
G20= Nissan primeria P-10 and p-11 chassis
G35= Nissan skyline GT350 NOw here they did not produce the in the V35 chassis the 300 GT as well as the VQ25DD V6 modles
these cars around the world are nissan except for america also if youo look in the american mentality of cars they will not pay 60K plus for a honda or a Nissan that is because it is a japanese car and inferior to all other cars. Americans think since the japanese market is really for economy cars then i am not going to pay a lot for them that is why Nissan made Infinti so they could up charge on there better cars.