Damn, I have used the max out style for a long time (go heavy 6-8 reps) and yeh you grow. For 2 months now I have decreased the weight and bumped the reps to 12-15. My incline dumbell went from 110 to 70. I can't see where I have grown any but the fibers in my pecs have seriouslly improved. I do get sorer at 15 reps and can get more flex in each movement. I do not know whats best. I do believe that at lower weights you mature the muscle more but I'm not sure about how much rip and rebuild your getting. I am going to stick with lower weights thru this cycle just because I know I will never be as big as though guys, I just love working out and playing football. Now on legs I still go as heavy as I can because face if you want that split across your thigh you gotta go heavy. There are little things like pushing with your heels on the leg press that make you go lighter but your isolating that muscle, so thats just how it works. I don't claim to know all since most of my experience when it comes to lifting was thru h.s. and college football. A wise man once told me that if you want to look like a power lifter then lift like one, if you want to look like a bodybuilder then lift like one. I personally listen to it all and do what works for me. Just my .02