They really exist!
Tonight our Target cashier was so busy smelling the disposable baby washcloths we were buying that she left me to fend for myself about when to swipe my credit card. (I swiped too soon, so Lyn's coupons didn't get calculated into the purchase.) Long story short, it took twice the time to do the transaction because she had to call in "Marcella" for help on giving us credit for those coupons.
She didn't have the accent, but she definitely had "Target Lady's" enthusiasm. (She also didn't have the SNL writing staff, so the humor was negligible...but it was still comical.)