Understanding the new(?) ball flight law and trackman data on hitting down vs. hitting up pre/post impact has brought this to chew on. So, here I am wanting to discuss with you.
As you know, with any club when hitting down, although it is different on the degrees +/-, ball goes out, away from the baseline, where as when hitting up, after the passing the low-point, the club/the putter is travelling in vs. out, although very minute.
So, when we put the ball back, away from the optimum flat level hit with the putter, we'll push it right vs. when we put the ball forward, we'll hit up and pull left, if we were set up to hit our low point beneath our COG being the sternum.
Now, when putting, the arc of the putt will have very short low point/flat spot. Although he doesn't Stan Utley says hit down a little vs. Dave Pelz says hit up. Do you see why so much confusion?
P.S. A few years ago, a couple of teaching pro and myself went down to SE Florida to Dave Pelz Short Game School. Long story short, the instructor, after seeing my sweet spot after putting with clip to see if we are hitting the ball consistently, told me to keep putting the way I am which falls toward Ben Crenshaw-ish like stroke. Point is, it's not straight back and through nor hit up.