The idea that bent bikes are faster than road bikes is based on the assumption that they're more aerodynamic, which isn't always, or even usually, the case. There's nothing else special about them to make them fast. So, in order to reap the benefits of a speedier bike, you first have to be strong enough to ride at speeds where aerodynamics start mattering, which means you have to be an 18-20 mph rider on your road bike.