The UPS truck may be the subject of this photo but is not. What made me take quick snapshots as I was passing by the place was not the truck but that it seems to me I have passed by this restaurant and there has always (or 50%+) been some kind of truck parked in front of the place. I associate the facade with a large truck parked right in front.
I think this is a good example of what makes a restaurant to some extent in San Francisco. Spaces in SF are narrow thus lacking large facades to make interesting display. The exterior may be luxurious here but doubt if they have received $10 of business because of what the outside of the place looked like. That is completely different in other locations and many other cities. The facade of the restaurant has a good deal to do with how much business they receive.
I still think the truck should not be in that location. They should park them (if possible) a little off so the exterior always shows. I am confused how critical that maybe but still bothers to some extent. Heck who cares anyway but may be something to learn for other restaurants that need the proper first impression on the outside to get good business.