Anyone educated about dogs knows that 8 weeks is a very appropriate time to get the pups to their new homes. They are starting their first fear period and that's when the optimum bonding to their new owner takes place. Socialization too, is best started early, of course taking care about exposure to parvo and the like.
My Doberman breeder has had the #1 Doberman in the country a few times over, has recently been awarded breeder of the year award, not only for Dobermans, but for all breeds. She gives her pups up between 8-10 weeks, depending on the ear healing. Reputable breeders don't sell through the newspaper and do take care about genetic health testing, among other things.
Anyhow, congratulations on your new puppy. I can see you're thrilled. There are some things that are good to learn when getting a pup. Now it's up to you to socialize the dickens out of this puppy, get him a check up by the vet and start some basic obedience skills. Lots of love and patience and positive methods for training (not to be mistaken for permissiveness) and you'll have yourself a fine dog, I'm sure.
Don't listen to doomsdayers. If you want good, accurate, educated and friendly, upbeat information, go on the AKC and/or your parent breed club websites and there's all kinds of neat stuff. A crate is a great thing to assist with housebreaking and to use when you can't watch the pup. They are like little toddlers who get into everything. But, I've had dogs for over 40 years and we didn't use to use crates. I don't know how I did it, but did it. LOL.They are helpful, but shouldn't be used excessively. I don't like a dog being locked up all day long. Four hours in a day is quite enough. They need exercise and companionship.
Good luck. Actually, you won't need luck. You'll be a fine puppy owner.