Never even thought about that, but you're right. My only experience with a geared bike is my mountain bike which I presume is a different beast than a road bike.

My hope is that a geared bike will allow me to keep my high cadence up hills which hopefully will translate into a more consistent pace instead of these huge changes going between 20-25 on flats, 18-22 on rollers, 7-12 on climbs. Obviously going down hill will still have a large cadence difference because I hit 50+ on a regular basis.