I'll disagree, but only because my experience has been different. When I studied Hapkido there was a whole formal dojo ettique thing, bowing, "Sir/Ma'm" respecting the belts, Etc... and the people were just not very tight or helpful, beyond what was required, or the ones who just are, whether you are the person in the dojo or some schlub on a street corner.
Conversley in my current dojo, we do 1 bow in and out. No training formalities, we refer to everyone by their first name, you wear what you want to wear, belt rank inst an indication of respect, etc... and we are the tightest group of people I know... we all hang out outside the dojo together, take trips places, socialize... in short we are all FREINDS as well as classmates.
So I don't think the two are neccesarrily linked. But I'll be the first one to admit our school is different than most, being that its not a "come pay learn" commercial environment.