I have exchanged three iPhones and two iPads under warranty for little defects. I was in and out in 10 minutes, I was genuinely surprised at how easy it was.
IPad 1's are in the zone of warranty expirations right now. I was thinking we could all post about known reasons that an exchange attempt might/would work. Nothing "underhanded" but defects that are negligible but will still get you a shiny new iPad. If this thread gets some responses I'll post the reasons I got exchanges. tried to google a list reasons but nothing came up.