Big10 - All of the teams aren’t big and there are more than 10 teams
Big12 - Most of the teams are little and there are less than 12 teams
ACC - While many teams are in states that are on the Atlantic Coast, one team (Florida State) is on the Gulf Coast and another team (Pittsburgh) is in a state that doesn’t border any coast.
PAC12 - Similar to the ACC, many teams are in states that are on the Pacific Coast (if you don’t count Arizona, Arizona State, Utah and Colorado). At least they counted the number of teams correctly.
SEC - All but two teams are in states classified as the Southeastern region of the United States.
Based on my analysis, I think it can still be called the Southeastern Conference.