Like Jake above, "My dad still has his old kelty external frame pack, orange shovel, nalgene bottles, pump filter, whisperlite stove etc..."
That's exactly my Dad, and this is the ultralight version of him. The Kelty is the one I graduated out of borrowing to get the one in the photo to the left, and replaced a heavy GI ruck he used before that. His Kelty doesn't even have a padded waist band, rather just a strap. This is a guy that climbed Whitney in 1958 with a flannel sleeping bag, steel canteens, a can of sterno and Dinty Moore stew, so his view of the Kelty, Whisperlight (okay, he bought that because it was lighter than my XGK), down bags and nalgenes are that they ARE light! Considering the miles and power he can put down on trail, there's something to this.
Oh, and when you have 80lb of deer meat to hump 9 miles back to the trucks after you hauled in 2 gallons of water and a GI shovel to bury the offal and such, there ain't no fancy-shmancy frameless packs from Cuba ( ho ho ) or titanium toil trowels at the party.
I can't tell you what a victory it was to upgrade our water containers to empty plastic gallon milk jugs and to Nalgenes from army canteens! Dad ditched the super-gnar boots for something a lot lighter, but hunters have different needs than fast-pack ultralighters, that's for sure.