Well, the kotaku link at the beginning of the thread wrote tht standard cars will have interior modelled, but just standard interiors:
http://kotaku.com/5565396/gran-turismo-5-might-have-too-much-detail
"The Standard cars apparently won't have the exact interior modeling. For example, an Enzo's interior will look like the real deal, but your typical Mustang's will look like exactly like Mustang's."
I think they will include some sort of standard interior for the 800 standard cars, but the premium cars will be modelled exactly as the original. I guess we will find out some days before the release when the first reviews come.
updated: 14.01.2012
playing right now: Xenoblade Chronicles
Hype-o-meter, from least to most hyped: the Last Story, Twisted Metal, Mass Effect 3, Final Fantasy XIII-2, Final Fantasy Versus XIII, Playstation ViTA
bet with Mordred11 that Rage will look better on Xbox 360.
