Earlier this week Matthew Yglesias took us to task for referring to a “Mid-City” part of town when discussing a campaign for a new Trader Joe’s near U Street. Matt is actually quite wrong to suggest “shady real estate cabals” are the architects of the term Mid-City, but the fault for his misinformation is likely ours. You see, last winter we ran a post mocking the MidCity Business Association’s moniker, basically accusing them of trying…