I can jive with that, I want them to stand out from the competition. Though engineering wise, I feel as if this constant pushing for performance metrics will continue to be a sticking point regardless of what Lexus does. It's clear from their performance cars that they're not always chasing lap times, or performance metrics either. They want to blend that enjoyment of driving, the connection to the machine, be it acoustically, or chassis dynamics while wrapping the driver in a stylish, and luxurious interior and a sleek, and unique exterior.
On a similar note (though somewhat unrelated from the topic at hand), even their usual luxury car assortment is pretty competent, they succeed at being just that, luxury cars, despite their architecture not featuring the aforementioned innovation of the German cars. I honestly can't imagine those who have an IS are having any less fun than those who own 330i's, C-Classes or A4s driving on a backroad, or hell, even on a autocross.