The TSA has come up with one useful rule: you are allowed to pass through the security checkpoint without removing your iPad from your bag. (Brilliant move by Apple marketing, BTW.)
As a self-respecting geek and iOS developer I of course travel with plenty of electronics. On a recent trip I happened to have two iPads in my backpack while going through security. That was however too much for the TSA to swallow. (“Is that two iPads in your backpack??”) The iPads had to be separated and take another trip through the x-ray machine.
I honestly don’t know if the “iPad exception rule” is a general free pass for all tablets. I doubt it. The iPad is relatively easy to identify, but how would a TSA drone distinguish between the plethora of devices that get marketed as tablets these days. But that’s irrelevant for this story, since I can’t imagine anyone actually owning two Android tablets?