Im seeing it to, with my homeschooled 8 yr old. She has always been a spirited girl, but boy, starting around age 3, she just started working the manipulation. Seriously. It is in her hard wiring... nothing learned. There was no manipulating going on in our house, she had hardly ever been babysat, no preschool, nowhere she could learn it at that age!
You can look through the 6 types of manipulation, and if one doesnt work, she moves to the next one, and then the one after that... its just part of her personality to be that way.
Its getting harder, but I am becoming more savvy at recognizing it and squashing it when she tries it with me. If I hear her doing it to her siblings, I call her on it then as well.