The pull away as a defensive tactic wasn't always as successful as you seem to think. With teammates whipping their jammer around the track, he (after all, it was rarely used by any derby ladies team, even back in the day) would often catch up to the slowest skater from the opposition in the pull away (remember, they'd be skating single file most times), nudge him aside, then the next, and the next, and the next, and then the fifth skater would feel the speedier jammer's wrath. A Roller Derby Grand Slam for the team NOT using the pull away! It was probably used as a "defensive" maneuver to showcase the opposition jammer's skating skills, not to stop the opposition from scoring. (Remember, this was derby as theater; i.e. "sports entertainment" pre Vince McMahon.)
KoP has been deposed by a yellow clad bunch of crazy cabbies.... Even the rest of the Queens have turned on me. You'll soon find me in beautiful downtown Newark rooting for J C B& P. And I'm retiring from my job at the end of this month!