Thanks, will do. Screwing around with technology isn't JUST my hobby, it's what I do for a living . I agree, I doubt Apple would knowingly ship computers with faulty components. That's why we 'love and trust' Apple. Worst case, it gets a lot more expensive for them to replace all of the bad machines/do a recall down the road.
For example, in the UK they would have to fix faults for a length of six years _if the fault was present when the machine was built_. If one of the good 6 GBit ports breaks after one year and one day, bad luck for the customer. If Apple used one of the faulty 3 GBit ports, and it stops working after 5 1/2 years, Apple has to fix it (in the UK).
And I am quite sure that Intel didn't give these chipsets to anyone who didn't sign a contract that ports 2-5 are not used.