It's usually wise for me to steer clear of threads dealing with sounds, Standards or bot A.I., but what the heck.
I was the early one doubting that we'd get a serious sound update in GT6, because 1200 cars are a lot. Actually, it's more like 900 to 1000 discreet makes and engines. But then as Griffith pointed out in another thread long ago, most street cars can be modified, so let's ballpark at 600, multiply that by four for just the muffler mods (stock, sport, semi-racing and racing), and that gives you 2400 recording jobs to work on. A lot of that can be fudged, and I can't think of a better reason to fudge! And if Forza 4 on 360 doesn't have room for quality sounds on all cars - it doesn't - you can't expect magic on a PS3 game.
GT7 has to have something. If they simply tweaked and roughed up the existing sounds for what they don't have ready to go at launch, that would be something.