If I recall my visit correctly, the houses they DID depict are all in a row on one side of the street, so it's understandable that a photographer would snap them all. Maybe the light was better facing that way.
There was one very cute pic that appeared to be of a legacy and her mom rushing to their house. That's an "awww!" moment. Anyway, I visited on a Sunday morning in the dead of winter, so it's fun to see pictures of the campus come to life.