I own and ride a Tassajara by Gary Fisher. This is my first bike shop type bike. I bought a mtb because i live out in the sticks so to speak. I have to ride 3 miles of sandy roads to get to pavement. I do a lot of road riding (once I reach the pavement) and some off road trail riding on the weekends. My question is all things being equal would i notice an increase in my average speed on a road bike (on paved roads of course) over the mtb? I'm thinking about saving my pennies and getting a road bike also

thanks in advance.... Jay.......