If all the drivers were going the same speed I don't see how faster would be a bad thing.
As is there are hoards of drivers addicted to the Passing lane and driving well under the limit, being tailgated by drivers that want to get down the road with lots of dodging and darting to get around.
It's not unusual to wait behind a driver that wont merge with traffic until there is a clear shot to the far left lane.

IMHO, it's the Difference in driving speeds that is the real danger. Not just the max posted speed.

"Camping places fix themselves in your mind as if you had spent long periods of your life in them.
You will remember a curve of your wagon track in the grass of the plain like the features of a friend."
Isak Dinesen