size matters to me.
I didn't notice anyone behind me when I ran and talked with the pace leader, I'd had forgotten that I was with a pace group.
My last marathon, I did alot of talking, yet, it didn't go unnoticed that 3 of us rotated and 3 leeched off of us.
One on one. If your on my heels from 1-10 miles without offering to work together, expect some unpleasantries.