No, it's not in all how they were raised! How they are raised can influence how they turn out, but the way pups are raised can only modify the genetics the pup was born with. It's truly a combination of Nature and Nurture. Only by breeding from dogs with appropriate dispositions, socializing the pups correctly, and being sure that the new owners continue the process, will we end up with puppies who display optimum dispositions. I've mentioned this many times, but just read a blog post that says it perfectly. Please take a minute to read this excellent post.
It's All In How They're Raised