My Cousin bought a iPhone 4s from Australia. He dropped the phone and front panel was broken. When he went to Apple store here, they even refused to look at it, saying warranty covers for products bought only in India. Don't know if the same applies for iPad.
Every product that apple sells (iPad,iPod,MacBook) has international warranty... Everything except the iphone... As it is that phone would not have been covered by warranty as it is physical damage done to the phone and not a manufacturing fault...