hard to say, it depends on the product and how much it cost.
If this happened to me again, and was a less expensive computer, I likely wouldn't care as much. It'd still bug the heck outta me, but I'd be able to learn to deal with it.
For what macs cost, I don't have any qualms or any guilt about expecting things to be pretty much perfect. I understand there will be things slightly wrong here and there due to mass production, but when its something glaringly obvious like a stuck/dead pixel, that's where I draw the line.
And besides, there is no publicly stated rule that says it has to be 5 dead/stuck pixels before a replacement/refund. I know Apple has that knowledge base article on stuck/dead pixels, but last I checked, it didn't stipulate any rules when trying to exchange/return a computer for dead pixels.
I can't say I agree with your statement about how few LCDs are perfect. Out of the entire time I've purchased electronics, I've only encountered just 2 instances of a stuck pixel. Perhaps I've just been lucky, I don't know, but I'm seriously not kidding.
Lastly at this point, it seems absurd to still think that stuck/dead pixels are acceptable due to cost. While this might have been the case a few years ago, if cost is the big reason as to why we're supposed to accept dead/stuck pixels, how is it possible that companies like Dell can offer a guarantee on no stuck/dead pixels for their LCDs?
http://accessories.us.dell.com/sna/sna.aspx?c=us&cs=19&l=en&s=dhs&~topic=premium _panel
(I know what I found applies to monitors, but I'm just using it as an example)