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I "come from" the heart of the midwest, flyover country, and Miss "You betcha, I'm so folksy!" isn't fooling anyone, least of all women like me who went to school with her type, the vacuous, yet vicious cheerleader who would 'wink' at you while you faced her, then stab you in the back as soon as you turned..
Check out this entry from Andrew Sullivan's blog. You can listen for a while at Sarah-baby debating back in 2006. No "you betchas" or "doggones" thrown in there back then.
http://andrewsullivan.theatlantic.com/the_daily_dish/2008/10/palin-on-benefi.html
She is the GOP showgirl. Doing her pseudo-folksy can-can.
The verb-emptied sentences were already part of her style back then, though.