Some have, some haven't. PD are getting much better with their sounds; the 97T and the VGT's after the Subaru are good examples.
Now, we wait for the PCars fanboys to come here to criticize everything about this game...again.
One or two cars seem reasonable. But i think they are starting to make a major overhaul.The Mazda VGT's sound was modified a tad bit, as well as the X2014 Junior in the past.