The thing is, you just read really superficial stuff about the handling and it's coming from GT fans (some of which surely have a valid and balanced perspective, but others won't).
What I've seen from how the car behaves after losing traction, the handling still looks a lot like GT. The tire squeal and when it sets in, suggests the same imo.
In terms of physic-authenticity this game can't compete with Assetto Corsa, iRacing or the ISI-based sims. Which is not good, if you want to attract the best racers out there.