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I've had an ipad since 2007

The first iPad was released in 2010 and these gestures are only for iPad2 and up (unless you jailbreak).

That is no longer the case. I have an unmodded iPad 1 and I can do the Grab to close, 4 finger app switch, etc. Just enable them in the settings. http://www.zdnet.com/blog/hardware/how-to-activate-ipad-2-mu...

Thanks for this.

uff. complete brain meltdown. I meant 2010.