What was the other fellar's pov?
Fold your string in half at the nock point and compare the two segments. I'd argue the upper limb is effectively shorter, if you place the arrow pass above dimensional center. As I understand it, positive tiller has the purpose to balance this inherent asymetry. Otherwise the bow would tend to rotate upper limb toward archer as the draw increases.
For my shooting style (more or less 2 under) and arrow pass placement (1" to 1 1/2" above) I can usually get by with 1/16" to 1/8" positive tiller and a modesst 1/8" to 1/4" nock point. But I don't use an arbitrary choice for any of that, rather I settle on one component, say arrow pass, then trial and error to get the best shooting manners with the least set. And I'm liable to jiggle around on the parameters (tiller, nock point, arrow pass) hunting a sweet spot as the project progesses to shot-in, ie. finished bow.