Question really says it all.
I was doing fine for about an hour. Beat Act I on normal, killed the Butcher by myself, then started Act II.
Just as I entered the desert with the Enchantress I hit a lag spike which lasted about 10+ seconds where I saw two enemies on the screen and I knew this was not good. So I quickly alt-F4'd only to come back and find my character dead and unable to play.
I know Blizzard is strict about Hardcore characters, but is there really no compensation for death due to lag? What if it were the Battle.net servers that caused the lag spike?