4:30 remaining. It took 2-3 minutes to remember Maryland and Massachusetts. Before that, Washington & Oregon stumped me briefly.
I started off trying to do the map thing, starting in New England, which I feared would be the toughest, but then I started just doing it by college conferences (now, which states are in the SEC? the ACC? the Big 10 & Big 12?)
Finally I resorted to thinking alphabetically. At work, we use state checklists that I look at frequently and I finally realized the "M" category seemed a bit low.
Great link - I'm going to email it to torture some family.