If you guys want to check out the actual patent for this accelerated process for aging the rhizomes, it's here
(you need to get a free login).
It's brilliant. They basically NUKE 'em with badass radiation, and the aging is done in DAYS. Elegant, clean, no radiation in the product (to calm the worries of anybody who doesn't understand gamma irradiation). I had suspected that they could simply isolate the larger molecules that are broken down to form the good smellies (the irones), and then perform the oxidation synthetically. But by just zapping the things, presumably the same enzymes and whatnot that help pull it off normally are still there to help do the job. Very slick idea.
I still remain curious, however, if a sensitive nose could pick up irones from the flowers, where (if it's present) air oxidation of the same triterpenoid precursor (big molecule) could in principle occur, albeit not enough for most people, and particularly not enough for use in perfumery. So with that question, as a pesky scientist who likes to re-ask answered questions to learn more... Are there any others here who think they catch ANY iris odor from flowers - noting that not all iris variants have the same distribution of aromachemicals.
[Edit added: I personally have never been able to detect the iris scent from the flowers, but my nose is not particularly sensitive to it, and I sniffed most iris plants BEFORE I was good at identifying it. Also, I should add that I'm hypersensitive to violet and violet leaf, so I tend to be sympathetic to the idea that some folks might be able to get it.]