Holy crap folks...chill out with wrestling the iPad,
Seriously, no need to break the case and all that....jeez.
Here is the EASIEST way to remove it from the case...
First, remove the silicone.
Secondly, remove the back cover...the one you need to remove to charge it.
Finally, simply put your thumbs on the bottom of the iPad, and grab the bottom of the Otterbox and push up. The top of the case will come apart from the bottom and you can separate them.
It isn't a bad design by OB or anything, it's just user error.