This has hopefully been sorted now but I just need to clear things up here, and I must say I am dissapointed that this has even been posted on here - your RMA was delivered yesterday and has been looked at today for a start
When a PC comes back and is faulty, it is diagnosed, if the parts that is faulty is no longer made anymore, this has to be sent back to the manufacturer of the part for (and it is done in this order, it is not up to us but them) Repair (1st) Replacement (2nd) and if they cannot do either, a credit is given for the current market value of the card.
We cant just throw a card we have in stock into the PC, this would lead to us haveing a giant excess of stock, second hand cards, repaired cards, even replaced cards which we can no longer sell or do anything with as they are out of date.
In this particular case, as the PC was a few weeks old, a compromise has been made, however, in any other circumstance this will generally not happen, and this is the part i feel i have to stress, the wait for the replacement of the card is UP TO 4 weeks, i.e the maximum it can possibly take, we state this as we have to, it is generally completed much quicker.
So, to clarify, if a card can be replaced in a reasonable amount of time (i.e in any court of law that would normally mean 30 days) then it will be, if it cant, it will be replaced with something of equal or better performance.
Bad support? In my opinion not at all, if you can find me any other company that will just send you a new graphics card out when the old no longer made card can be repaired I will genuinely be flabbergasted.
Buzz's post above is also fantastic and is how 99.9% of any other companies would act - but you have taught me a valuable lesson here for which I thank you for.