What you're assuming here is that everyone is doing pushups in the same way. Some of the difference between people liking/disliking certain approaches has to be

What you're assuming here is that everyone is doing pushups in the same way. Some of the difference between people liking/disliking certain approaches has to be related to not understanding it and applying it in the same way, surely? I myself couldn't get my head around TDD for ages and then it suddenly clicked and I became a complete convert.