Will downgrade to ICS from JB cause app data loss?

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http://forum.xda-developers.com – Hey, I'm rocking an unrooted TF700 with build number I want to downgrade to ICS in order to root. My question: Will I lose app settings, data and game progress in the downgrade? My wife and kids would kill me. I was rooted for the longest time - but forgot temp unroot when updated to .23 and just left it. Anyways, I hope there's a way to keep my apps as they are now while downgrading. Thanks. (HowTos)