Agreed. With practice, you barely have to ease up pedalling at all. It's all about developing the right technique. With derailleurs you should really be easing up on your pedal force while shifting anyway. Another big advantage is that you can fit a proper chainguard- great for cycling in ordinary clothes. IMO, for the commuter, an IGH has no significant disadvantages to speak of, and a lot recommending it over derailleurs, particularly if riding in winter.