Earlier quoted context omitted.
Yes, I agree. The flow of traffic for most commuters, like myself, seem to around 75 mph. "The speed limit is commonly set at or below the 85th percentile operating speed (being the speed which no more than 15% of traffic is exceeding)[41][42][43] and in the US is typically set 8 to 12 mph (13 to 19 km/h) below that speed." http://en.wikipedia.org/wiki/Speed_limit
On the other hand, if the speed limit was set at 75mph, would that remain the common speed of traffic, or would the common speed increase with the limit?
[0] https://en.wikipedia.org/wiki/Speed_limits_in_the_United_Sta...