This is definitely true since the GSF and RCF are RWD with LTVD correct? Most competition with torque vectoring rear differential are AWD so at least Lexus has got this market cornered with the RCF and maybe the IS500/F?AWD advantage is only in the first 60 foot. After that, it is at a disadvantage. Higher drivetrain loss and more weight. Also, weight distribution also favors RWD better.