P.S., I used to work in a shelter. We would adopt out at 8 weeks, but 12 weeks is ideal. Kittens are physically and mentally healthier when they are with their mothers for that amount of time, as this is when they strengthen their immune systems and learn basic manners.

Taking it any earlier shows great irresponsibility, both on your part and that of the breeder. In fact, if the breeder let you take it any earlier, I'd be comfortable saying that it's probably a backyard breeder (or kitten mill) situation.