After iFixYouri got done with their iPad and iPad 2 glass stress tests, they found out the iPad 2 has zero water damage sensors like the ones found on the iPhone. After customers complaints (one even sued Apple), their water damage sensors were falsely tripped due to very humid weather conditions, Apple probably decided to avoid any more arguments with the iPad 2. There are other ways to detect water damage of course, one being green corrosion that will occur on metal after a while but it's nothing close to the instant water damage indicators. It's good to know that it won't be the end of the world when your iPad 2 accidentally drops into a pool.