From this OS X Daily article, the official dead/stuck pixel policy (from 2010) is:
Apple’s Dead & Stuck Pixel Policy
Here’s the breakdown from the leaked Genius chart:
- iPod nano, iPod touch, and iPhone screens: repair or replace after 1 or more dead pixels
- iPad: repair or replace after 3 or more dead pixels
- MacBook, MacBook Air, MacBook Pro 13″ and 15″ models: replace after 4 or more bright pixels, 6 or more dark pixels
- MacBook Pro 17″, displays up to 20″: replace after 5 or more bright pixels, 7 or more dark pixels
- iMac 24″ and iMac 27″, Apple Cinema Displays from 22″ to 30″: replace after 9 or more bright pixels, 11 or more dark pixels
However, the article also suggests that real world treatment can be very different:
Apple’s Official Dead Pixel Policy vs Real World Experience
While the official guidelines for handling dead pixels seem strict, I
suspect there is a larger policy at the Apple Store for ensuring
customer satisfaction. Speaking from direct experience, Apple can be
far more generous than this support document suggests. Case in point;
I purchased a MacBook Pro 13″ earlier in the year and discovered a
single dead pixel glowing bright red smack in the center of the
screen, you couldn’t miss it. I took the Mac back to the Apple Store
and an Apple Genius swapped the machine out immediately, saying he
wanted to be sure I was happy with my purchase. The new MacBook Pro’s
screen was flawless, and yes, I was happy.
My advice to anyone who is dissatisfied with either a dead or stuck
pixel is to talk to Apple, at the end of the day customer service
seems to always win out over official policy.
Your best bet is to bring in your machine to be checked out - it's quite likely that the Apple Genius that you're working with will do his/her best to make you a happy customer.