I have tri bars (done some tri's) but it don't make me no faster!!
I think it's getting up the hills at a decent pace that I struggle with, I have MTB rear mech and cassette on my road bike just so I can keep going up the hills!!!
Did a hilly 38 miles road bike on saturday 3256ft in ascent approx and I only managed a pitiful 13.2 mph - mind it was bloody hot and windy!!