There is a vast difference between the record companies and Apple's public relations - the record companies do not require public support to be successful businesses. Look at how much Sony screwed its customers over; only then did a boycott begin, one which probably had very little effect on their bottom line. Apple however probably want to avoid being associated with restrictive and heavy handed licensing as they can see what harm it has had on Microsoft's image. In the end Jobs' letter was a simple smoke and mirrors game to even out the blame across the whole industry, with DVD Jon's comments being proof of this.
The problem is without more details on the agreement Apple has with the record companies, it is impossible to know if Apple are playing fair or not.