That scales with distance. If you're driving 30kph slower for 2 hours, it makes a difference. If you're heading 10-15km to the shop or the creamery, it's not so terrible. Speaking as someone who was a speed freak as a new driver, and sets my cruise at 78 in an 80 zone today...speed ain't everything. You wouldn't want to drive one of these kei vehicles on long trips, anyway.