At least you're not on the couch! I looked back at my training log from my first ride and I averaged 8 mph--and I thought I was FLYING! My speed has increased significantly on my hybrid--my family rides a loop and the boys now have new street bikes. Our training is riding as hard as we can so they don't lap up before we get in 5 laps!

And 12 mph is good! I just started riding a hilly route for training and my husband said I was averaging 6-8 mph at the top of some of the bigger hills and that was slowing my average speed down (I was too busy to look--I was just trying to not stop or fall over!)

What SIZE tires do you have? We swapped out the 32's that came with my bike for 25's and that also increased by speed.