For the LMP that was modeled there was, especially if the car then became damaged. But it could also be that the cars were cornering as fast as the BF1..
When we did GT0 in MoE, just adding 100hp to the GTRs had no effect on how the cars looked on track however.
Oh I agree, just pointing out that the fog was nothing more than visual.
The "dynamic" weather that is currently there is quite interesting. I haven't seen the temperature itself change, nor the humidity, but the wind speed and direction changes rapidly. Within 3 seconds I've seen it go from N @ 5kph to SW @ 23kph. I'm assuming it is the preference of who hosts, but it can be quite drastic for the lighter cars (can lose like .3 on straight).