<<Umm, by the time Lutz joined GM, the CTS was already finalized. Maybe you're talking about an upcoming redesign?>>
I reread the article again and it's the new '04 Seville STS, not the CTS.
http://www.autonews.com/article.cms?articleId=37249&a=a&bt=lutz
"Zarrella told of Lutz's first glimpse of the Cadillac STS, due in model year 2004. "We had pretty much finished the design," Zarrella said. "He said, 'You guys can make this a lot better by doing a few relatively minor things.' "
At Lutz's urging, the "tumblehome"- the degree to which the vehicle tapers inward from the beltline to the roof, when seen from the front or rear - was increased and the taillights were redesigned. "You listen to it, and it doesn't sound like much, but it improved the car," Zarrella said."