I know handoff must use bluetooth / wifi direct or similar technology but this behavior doesn't seem optimal to me. When I get home all my IOS devices ding with all the text messages I got throughout the day. It would seem that other devices are only updated by proximity to the IPhone. It is also a problem if more than one person shares your iPad since they will get your text messages also. I guess you could just turn off handoff but you lose the ability to hand off other apps as well?