To be honest, the so-called "exception" is simply an option within the standard replacement guidelines, but it is only done once given the approval by a manager. Given the lead times for replacement i7s, most managers would be willing to offer you what is known as an advance exchange/replacement (i.e. when they advance ship you a unit and upon the unit's receipt, you ship the defective one back).
Almost 100% of the time however, the managers will also ask you to send them an email stating that you will return the defective unit within 10 days of receiving the replacement, and if you do not, they will charge you credit card.