Okay, before you go and try to make an argument with Apple, especially if you're trying to get a replacement part, you need to understand that some defects will not be covered if they are due to "User Mis-use." (I would know, I have had 3 replacement MBPs, 3 differnet screen replacements, 5 or so internal power management system replacements, and 1 keyboard replacement...all NOT due to anything I have done)
Here are some ways to approach your problem, and hopefully get a replacement LCD:
1. First, all LCD screens do not turn on evenly, or to their full potential brightness immediately. Run your computer for 30 minutes at full brightness, and THEN look for any problems.
2. Go to the Apple store and explain your problem. Keep the computer in the CASE! ---very important note, don't let a genius even see the computer until he/she fully understands the problem
3. As noted earlier, explain how you feel that Apple makes a "superior product" that is "conducive to maximized productivity" (They LOVE to hear that)
4. Then remind the genius how the problem with your screen is actually a DETRIMENT to your productivity. ---NEVER SAY: AND IF I DIDN'T ALREADY HAVE A BUNCH OF SOFTWARE THAT ONLY RUNS ON A MAC I WOULD HAVE DUMPED THIS THING A LONG TIME AGO. Why should you not say this? Well, a genius hears "I'm invested in this product, and even if you don't fix my problem, I'll still probably keep using Apple's stuff"- this is bad, in case you didn't already realize
5. Now, AFTER the computer has been off for over an hour and you've explained the problem, take the computer out of the case, and let the genius turn it on.
6. As he does so, the screen will not light up evenly, properly, etc. Point this out!
7. He or she will say pretty much what I said in #1, but this is where you respond with "I understand how an LCD works, light distribution/initial brightness upon start up is not my problem. My problem is that the poor light distribution continues to persist, even after I have been using my computer for over an hour.
8. Then put the guilt trip on the genius about how you wanted to experience the "Apple" side of things, but you feel let down, yada, yada, yada, and then ask why Macs are better than PCs.
9. Let the genius go "Ahhh hahahaha," they tell a story, you pretend to care.
10. When they are done telling their "Apple Love Saga" (as I have come to call it) YOU SAY JUST THIS ONE LINE:
OKAY, THAT IS CONVINCING, WHAT CAN YOU DO TO HELP ME?
11. Gloating genius orders new part. Game. Set. Match.
-Good luck!