yeah you gotta stop thinking about android and just move on.
when the iPad is sleeping , it puts the wifi in a low power state. the wifi might not even be on or not at all. someone else who knows more can chime in.
if the iPad is sleeping , it can still respond to find my iPhone
i wouldn't worry about it.
however i want to mention that i tried pinging my sleeping iPad and it was not responding to pings. meaning it could of been disconnected from the wifi network, as soon as pressed the home button ( but did not enter its passcode ) it started responding to pings
if the screen is on, it responds to pings
if the screen is off , it does not respond to pings.
if the screen is off, it can still be located.
the iPad can go days or even weeks on standby , with the wifi radio on.
i have no there way of proving one way or the other if that wifi radio is on when the screen is off
my windows desktop pc won't respond to pings or samba when its sleeping. the only thing that wakes it up is a magic packet. i can't even rdp to my windows pc when its sleeping.
we have no idea of what magic packet apple uses, if they use one or not
a sleeping iPad can respond to tethering
its wifi has to be on but its partially ignoring the world
it seems to take 15 to 30 seconds of sleep to make the iPad stop responding to pings