No, not the core, or the stem, but the shaft. It's an unsubstantiated rumor, but one that actually might make sense. Though perhaps not in the way the original posted thought.
News around the web is that Apple is planning to reduce its iPhone shipments to Rogers, Canada's lone GSM/EDGE/HSDPA provider. The rationale is that Apple is punishing Rogers for its expensive pricing and three year commitment requirement.
Rogers only has a few days left to make adjustments to its pricing. Major Canadian media outlets (2) are encouraging Canadians to boycott the iPhone until Rogers comes out with competitive plans. Internet petitions are all over the place. About half of Digg's Apple stories of late have been related to Rogers iPhone backlash.
While the poster of the original blog rumor held that the reduction of iPhone 3G supply for Rogers was sort of a "look who's boss" type of move by Apple, it seems more likely to be what the writer above indicates: a smart business move. Apple sees all the negative reaction to Rogers' plans, figures "heck, they're not going to sell many," and redirects supply.
On the other hand, if the taking of this action results in some RE-action by Rogers: all the better.