I kinda look at it a little different. I make them that way because I believe the limb starts at the fulcrum. In that light, the limbs are about the same length.
Torges' point, I think, was that for greater balance, you start at the balance point. Now different grips definitely influence this and it is really easier to tiller equal limb bows so the argument has merit. But I have found that Dean's theories hold true in my practice. Since I have relied on the fulcrum principle, my bows are smoother shooting, and fall into tiller more easily. Intuitively, it just matches my brain better.
That being said, on bows over 62" I doubt it really makes a bit of difference and I have had equal success with both styles. The shorter the bow, though, the more critical it becomes.
The way I see it, ideally, we would have the center of our grip pressure at the center of the bow. We would have the arrow launch from the center of the bow. As a correlation, we would have our nock point and the center of our string-hand pressure in the center of the string. (Think about string loops on compound bow strings. Don't they straddle the nock point?) Now since not all that stuff can't happen exactly, we have to compromise.
I think that's also why I have grown to love short, narrow osage bows that bend in the handle. The simplest design to make is probably the best for me. I guess the K.I.S.S. principle applies here too.