well, in Wing Chun punches have nothing to do with english boxing ones !

In western boxing you learn to punch hard using your muscles, in Wing chun you learn to relax in order to use your body mechanics properly (punch alignement, body mass following your punches etc...), it's about the energy you can generate. So yeah punches are probably less powerful than western boxing but if you can wing chun punch properly you can still knock someone out if you're precise ;p



This demonstration is pretty nice