Historically, if I was down around 5,000 that would usually be indicative of a combo where you could use driver aids to get a decent lap (whereas in most cases CSA and stability control actually slow you down). With the new physics, I'm not so sure and I think it's something I'm doing, or not (DS4 on PS4).
I'm on a 1:21.6xx, which is 5,000+. When I load up a top ten ghost, they're just faster everywhere. Later braking, higher apex speeds, faster off the turn. Normally I can see some obvious issues but I'm scratching my head just now. Their cars turn in a way I've yet to figure out how to replicate, I can't even follow the line at a slower speed. Previously, I'd have seen that in a high downforce car, but not in Gr.3.
Whether it's a tyre temp thing (I think controller steering input on stick scrubs the tyres because you don't get a nice smooth consistent steering input, effectively literally over steering the car, which maybe overheats the tyres with new physics but the game is weird insofar as it makes a critical component of the physics i.e. temps invisible to players), I'm not sure. The usual shortcoming with change of direction on controller is evident at the corkscrew but that's probably only a few tenths.
I'm dropping over a second in both sector 2 and 3 and I can't figure out how to find the grip. Lifting off the gas doesn't bring the front end back and running in on a trailing throttle isn't sufficient to get the front end to bite. Accelerating just leads to running wide at the exit. When you look at what sector 3 actually involves i.e. the quick left, banked right and final tight left, losing over a second through there is nuts and indicative of an issue.