The playing in those videos often reminded me of this: http://uk.youtube.com/watch?v=ClA0OcwJ-8E.And Eddie's description of finding his tone is quite like this I thought: http://uk.youtube.com/watch?v=wgFEzk2VRXM
you wouldn't use the meat knife on crusty bread but, equally, the serrated knife and straight edge knife aren't going to go through raw meat as quickly