Summary: timing of exhale impacts the amount of stress from a foot-strike. If you can adopt a symmetrical breathing pattern, exhaling on alternate foot strikes (left, then right), you can protect against one leg's taking undue punishment.
The technique is to inhale for three counts (footstrikes) and exhale for two. If you have to pant (last mile of a 5K), go 2-to-1.
Maybe it works. The author trained himself from an impressive first marathon at 2:52 to a PR of 2:13, while apparently avoiding nagging industries of his youth. (I find that statistic amazing. It always seems as if elite marathoners were never ordinary. This guy, Bud Coates, was at least only a little awesome before he became way awesome.)