Manufacturing Defect
Backlight bleeding at any rate is a manufacturing defect. If I was paying 499 for the 16gb wifi model it would be a little broader range for this defect, however when you are using a device such as the 64gb wif+3g, you have paid 829 for a device that is using its screen as the "main attraction." Apple should be willing to replace these that customers are unhappy with because Fanboys, the ones that really care, are the ones who will drive the most personal selling outside of an apple store.
Apple has no reason to not replace a defective product that makes a good customer unhappy and I think he as well as I would agree that with minimal bleed it wouldn't be an issue, for me the major bleed was in the upper-right hand corner which in a room with about 50% ambient light is gray instead of black, because of poor manufacturing. If the issue was not visible in a situation where I most often use the device I could handle it, but thinking about the large margin that apple is raking in on these things, means that they have built in room for replacing defective products.
Talking to the proper product engineer on the phone I was successful in having the product replacement request sent. The box should arrive at apple today, and the backlighting issue is almost identical. Yet another sign of defect is that not everyone has the issue, but two products on these forums have an almost identical pattern. To discount backlight bleed to this extent is silly, frankly I would much rather have 1-2 dead pixels than what looks to be a screen full of "hot spots" as on friend described it. The issue really jumps out at the user, which is the reason I opted to have mine replaced.
Long story short, apple has a lot of dedicated customers who buy from apple because they have solid customer support and produce what we have evaluated as quality products. As customers have the right to be upset when apple does not deliver on one of those expectations, but in this case (not mine) when both of these expectations are left unmet we as customers have the right to be upset with the result.
My suggestion would be to call and tell them that you were unhappy with the service. One time filling out the customer-service survey, they send it to your email address after a call, with low numbers because I was unhappy with the service resulted in an apologetic call from apple willing to do almost anything to make sure I was happy with the service. Most customer service agents and product engineers are nice, some have a stick up their ass, but its a tough job, so give it another shot on the phone and tell them that you are not feeling comfortable with the situation -- they may just listen.