checking time on way points is a good idea.
my commute is 11 miles and it takes me 45 to 50 min (kona smoke 2-9 with full trunk). mixed traffic; red lights, school crossings, and peds.
lately i've found relaxing and non-stop pedaling (non fixie), is as fast as if i push. i push, i break more, and stop more. same as in the car.
the game i play is not to touch the ground with my feet (i'm no trackstander). i time red lights, but never stop pedaling. just go, take it easy, and enjoy the ride.
btw, i'm a noob. so take it for what it's wroth.