In the early- and mid-1980's a few of us, working in a BPing store did the usual progression - having used heavy stuff on Scout trips, we got better stuff, then got too much stuff, than saw how much we could cut back, cut back maybe too far, finally finding our own comfort level. I remember a few climbers bringing half their calories as Squeeze Parkay margarine (calorie dense and cheap) and then never doing that again.
By 1984, without reading anything by anyone, I was doing 9 day trips with a tarp, no tent, no sleeping bag, no stove, no pots. I slept in my clothes on the lightest thermarest. I was still using a Kelty pack with a frame and yoke system (not 7 pounds, maybe 4.5 pounds) and of course didn't have a Nano Puff or Hoodini, but had a system of very functional, layered clothing. I'd converted to Nike Lava Domes as soon as they came out and have stayed with low-cut hikers ever since.
But, again, what I grant Jardine is that he got the word out. Some of his books present the innovations as something only he developed and that's not true. He may well have developed them independently, but he wasn't the only one.