The only things beneficial when using drop bars is the multiple hand positions and the aerodynamics when riding in the drops. This is great for group rides or short tours or wanting to get a quick, fast ride in to burn off that 12 pack you drank last night, but that's about it.

When I commute, I do not go for speed. I wear my work clothes when commuting and I don't like to break a sweat except for the ride home I'll push it.