Action points give you another action, don't forget. So for 1 round, a normal human (move 6) could go (6+2)*3 = 24 squares or 120 feet. That's a sprint.
For sustained running, a move 6 human can cover (6+2)*2*5 = 80 ft per round, or 800 ft per minute, or 48000 ft per hour. That's 9.1 mph, which equates to covering one mile every 6.6 minutes. Not too shabby.
For sustained running, a move 6 human can cover (6+2)*2*5 = 80 ft per round, or 800 ft per minute, or 48000 ft per hour. That's 9.1 mph, which equates to covering one mile every 6.6 minutes. Not too shabby.