I know for a fact that it's not your choice of tire. I have Q2s and on the street I've about an 1/8 inch of infrequently used tire on the rear. On the front, I've 1/4 to 3/8 inch of unused tire.
As to your question, I don't know for a fact why anyone has more front or rear wear to edge, but I guess most folks have a higher confidence level using available traction coming out of a corner vs going into the corner and so use more available tire on the rear. On the street I'm just not ok with pushing the front anywhere near it's limit. I've still had the front start to tuck at low speeds on cold tires, but never to the point that I felt I was going to lose it. On-the-other-hand I enjoy slipping the rear a little and have more confidence with it.
As far as suspension, for me, upgrading has resulted in better wearing tires and more comfort, but it hasn't changed the amount of tire I use front or back one bit.
Like you, I'd like to hear from someone who knows the answer.