Originally Posted by AntimonyER
Because its thin. It doesn't feel like a big hollow peice of plastic like the charge did.
Yep, and I think the plastic that is there maybe be denser or just more meaty pieces rather than big light flimsy pieces that surround a lot of the edges of the phone like the cover does on the charge. Basically the fact the light flimsy cover being relegated mostly to just the back face and not the actual sides that you are gripping helps give this solid effect.
It did seem plenty dense and weighty though even though it didn't weigh much. I would guess the S2's have a similar feel.