Seconded. I also ride a low-geared SS at 62 gear inches. While it places a ceiling upon my top speed and prevents me from keeping up with seasoned roadies (which I probably still wouldn't be able to do on a geared bike), I can still easily hit 20-25 mph. I fly up hills with great ease -- i remain planted in the saddle and spin, while riders on higher geared SS/fixies often have to stand up and mash. Acceleration from a resting state when the light turns green is also a lot faster. I dropped to such a low gear in part because I was having a patella tracking problem with one of my knees. Gearing down made it go away.