Further to umd's point... I never fell, either, but it was because I was hyper-aware that I was using clipless, and lucky enough not to get distracted by a stray thought during my first few stops. However, I was displaying the classic 'new to clipless' style of clipping out if there was even the most remote possibility that I might have to stop. Then I realized I wouldn't fall over until the bike stopped, so as I got more comfortable about clipping out, I clipped out later and later.