The cynical explanation is that the Israeli government monitors wireless devices of all types very closely, looking for both illicit communications from potential terrorists and for wireless signals that could be used to remote-trigger bombs--and that the lower power output from the iPad makes it more difficult to monitor.
A new wrinkle perhaps...
iPad/iPhone OS 3.2 Stops Renewing DHCP Lease, Keeps Using IP Address[i haven't read it yet]
