Well he might have a point. I wonder if the double vs. single rotation produces a significant difference in tip functionality. I doubt it...
No way it makes a difference...the tip shaper's purpose is to shape the tip, not dress the surface. I lay my shaft across my lap while sitting, hold the Willard's tool to the tip and roll the shaft vigorously back and forth. Once I get the desired bevel, I rough up the surface with a tip pick or by light brushing the tip with the Willard's shaper like it's chalk. Works the same on layered or non-layered tips.