Can we say that he would of still been suspicious and or not trusting of strangers, even if he was socialised ?
And confident with knowing what's a threat and not..
As a pup he had plenty of that defensive reaction, he was great as a pup..
Never seen him as a pup, but based on comments from dux and tessa he was good indeed. What I am saying though is, such developing conditions add some extra sharpness in my view.
If we talk personal protection, SUSPICION is a must and there's more to gain from having the growing young dog isolated, in my view. However when dealing with (street) service dogs, socialization becomes a must.