I've laughed at Storm before and been proven wrong, so I'll keep my mouth shut. When the original X-Factor came out, I went in to buy a "heavy-oil ball" and that's what my pro shop tried to sell me. I quietly laughed under my breath and bought something else.
A couple of months later, I went back in and got the X-Factor anyway. And lo and behold, it *was* a heavy-oil ball at that time. It took a couple of years before houses started laying down too much oil for that thing. I still have that ball.
So while it might be counterintuitive to say the Gravity is stronger than the Shift, it just might be. I know there was a lot of talk about the Gravity's new coverstock being "revolutionary" a month or two back.
Jess