Behaviour and temperament of a dog has more to do with the upbringing and training of the individual dog, than the breed itself.
Resist the urge to bring home pups as soon as possible. It is a convenience and money saver for the breeder. Some pups are even weaned prematurely by a breeder. It is a constant problem encountered with pups from large scale and small scale puppy mills. My wife and kids brought home one such puppy, at 9 weeks, despite my hesitation. What a mistake. That breeder, and a few pet stores, were finally busted for running a puppy mill operation. A good vet ( read old school) will help steer you towards a reputable breeder
Any reputable breeder will wait 12 weeks or more before removing a pup from it's litter. Generally,the longer the pup is interacting with the litter, the better it will socialize with other dogs.
After that it's up to the owner of the new pup to teach it social skills with children, strange dogs, strange people.