Interesting article, though is there really much new there? Also it discounts the alternative hypothesis of some bright spark acquiring wolf pups and doing it purposefully because that would take 'weeks'. Weeks, you say?
Surely some enterprising hunter-gatherer had sufficient time on their hands. I can't help but think strutting around with a feared predator at your beck and call would have been the ultimate status symbol, and once you saw it would have to be the must have accessory for the self-respecting hunter. Aficionados would no doubt breed their stock amongst themselves to save the hassle of having to abduct more wolf cubs, which would naturally tend to the more suited specimens (friendliness being one trait as you don't want them eating the kids). Once it was realised what an incredible force multiplier they are in hunting and their utility in defence, any time investment would pay for itself many times over.
I find this no less as unlikely as thinking humans would let wolves help themselves to their excess food. Fascinating subject all round, no matter the reason. I hope they can figure out more.
I see this as likely as becoming more amenable to humans over a long time due to free food.
Falconers often acquire and train wild birds. With wolves abducting pups or adopting orphans seems like a reasonable path to domestication.
> I find this no less as unlikely as thinking humans would let wolves help themselves to their excess food
Wolves can extract nutrition from animal tissue which humans discard, such as bone and the tougher cartilage/connective tissue. Modern dogs still absolute love bones.
They also have much better night vision than humans, sense of smell and hearing.
So, follow human tribes and pick off the remains when they move camp. Maybe eventually escalate to sneaking in at night. The human tribes now become a "resource" which the wolves will start guarding from other predators, such as bears or competing wolf packs. The humans eventually catch on that the wolves are providing a benefit at very little cost - food remains which they are not eating anyway. They even start to share kills - the wolves being better at tracking game while the humans finish the kill with spear/bow.
When animal and crop domestication occurs, you get another benefit - protecting the flocks/herds/crops from marauders. Especially at night.