interesting. My she-pup was very confident. Around 9 months she went into a second fear phase, maybe it was hormones since she was still intact at the time. My boy breezed right through that time. He got a bit rowdy and sometimes cautious of new things but with a bark and a stare, learned that everything was cool.
I enjoy reading this blog as well for dog behavior and training. Granted the section on genetics is opinion and based and anecdotal evidence, but it is fuel for thought. http://www.collared-scholar.com/more-harm-than-good-3-reasons-why-i-never-socialize-my-puppies/