I agree, if you spend only 7 seconds on a TUT then you've just wasted 7 seconds of your life, it has to be 8 seconds, except on Wednesday afternoons when 6 seconds seems to work well since I have to hurry home to catch Star Trek and Sabrina.
For confusing the muscle, I like to work with a training partner. I work blindfolded and my partner just hands me some weights and then tells me what exercise to do for each rep. It can get quite dizzying sometimes so I know it works well for me. I read that the dizzyness is caused by a testosterone surge in the muscles that forces extra blood into the brain.