So I've returned from Daytona, and I played GTSport in the booth, twice! The settings were forced to the NSX at Brands Hatch, but I was able to turn TC off. Here's my rundown of my personal thoughts:
Graphics: Stunning - Very pleasing to the eye and smooth. Only complaint is there would be frame drops, but that only happened once for me.
Physics: Enjoyable - They're not Assetto Corsa or rFactor physics, but they're still very solid. There was actual sense of car control, which made getting faster lap times more addicting. There was much more road feel and response than there was in previous GT games.
AI: ...still not good - They act the same as GT6 AI, just slightly faster on pace. I hope this is improved eventually.
Sounds: Solid and a definite improvement over previous builds and previous GT titles. There could be a bit more pop to gear shifts when in exterior view. There was a definite growl to the NSX, which was nice to hear.
Overall: While there are still things to be fixed an improved, it is already building up to be a solid game. Most importantly the gameplay didn't feel intense, mechanical, or very complicated to drive. While still having a sense of realism like road feel and keeping the car stable through corners, the game gave a lot more room to relax and enjoy the experience. I'm very much looking forward to the game's release.
I would say more if I could test different cars and tracks, but since this was an Acura tent, Brands Hatch and the NSX was the only car/track combo I could base my thoughts off of.