Oddly enough, the way that I do it is simply that I don't find the connection rating table to be very vague at all.
Your example contact will help me illustrate how I pick out the connect rating - I start at the highest rating and see if it fits, and then step down the table until I either hit a match, or think "No, that's obviously too low," and set connection to what I read before having that thought.
For your boutique owner
Connection 11 - The guy doesn't sound like he has world-wide connections or any serious amount of social influence... I mean, he might sell clothes to a few important people from different countries, but that doesn't mean he has particularly close relationships with them. Also, he's not even a direct employee of a AAA corp, so that doesn't apply.
Connection 8 - just the littlest bit too high for this fellow because he wouldn't have the same influence as a state government official
Connection 7 - he knows a lot of people throughout Europe, might have made a few notable friends in the area - so this is where I would set his connection... though I would only have that rating apply if what he was attempting to use it for was within his "domain" of Europe... in Seattle, for example, I would drop his connection rating to 3 because he's got nothing going for him locally beyond having "friends" at Saeder-Krupp.