I've definitely noticed more frequent "hold the wheel" nags in V10 when I am driving on local roads (non highways).
But I found this video where the driver actually times it.
Local Road (50 mph)
1st nag to 2nd nag: 12 seconds
2nd nag to 3rd nag: 11.25 seconds
Highway (80 mph)
1st nag to 2nd nag: 22 seconds
2nd nag to 3rd nag: 21 seconds
We see much shorter nags on local roads, half what they are on the highway.
But I found this video where the driver actually times it.
Local Road (50 mph)
1st nag to 2nd nag: 12 seconds
2nd nag to 3rd nag: 11.25 seconds
Highway (80 mph)
1st nag to 2nd nag: 22 seconds
2nd nag to 3rd nag: 21 seconds
We see much shorter nags on local roads, half what they are on the highway.