"It is lighter and more comfortable being held in one hand."
More comfortable, perhaps, but lighter? The Nexus 7 is 340 grams [1] versus 652 grams on the new iPad [2].
It might feel lighter, but it is all in your head.
[1]: http://www.google.com/nexus/#/7/specs [2]: http://www.apple.com/ipad/specs/