Sounds good to me about the Android for now though they both are quite new so the hackers just need some time learning how to crack them. I think it will happen though hope it gets harder for them, the better I hope so.
MAC with Safari gets lot easier for them to crack nowadays (for a sample).
One great hacker recently stated that the Macs are like the farmhouses out in the deep country without bars and locks while the Windows are like the houses in the deep crime zones with bars and many locks. hmm
So after all, we ought to expect Windows 7 and Android might be cracked someday, if not much later. Both are quite new and fewer customers but rapidly growing in numbers for sure.