MainzMan: I think it's more psychological to be honest
Mainz, as a " miss ding" putter, I can attest to the fact that there are breaks where "miss ding" alone will not compensate enough, you must use both ( move marker and miss on correct side ) so it would seem, conversely, this would also be true, however, given the fact that you can move the marker anywhere on the green, if you move it sufficiently to begin with to compensate for the break, then it may well be "psychological".
Doc :)