Thats another dumb article by the stat guys at ESPN. The last 5 minutes includes everything from tight games to blowouts by that math. When you blow people out, and they put their second unit on the floor, that will be a blowout too.
In addition, teams that are playing from ahead, usually get more points in the last minute of a game because they get free points just for foul shots...sometimes up to 6-8 points in the final minute of a game.
Anyone who's watched the Heat the past two seasons knows that they're asstastic in the most clutch situations in the last 2 years.
You can really see the over-inflation of the blowouts in these stats with the Lakers 08-09 numbers compared to the numbers from 2010. In 08-09 we rarely played any close games, and in 2010 Kobe hit 6 or 7 game winners by himself yet the 08-09 numbers tower over the 2010 numbers in that graphic.
It, like most of the drivel that Abbott puts out, gets refuted by simple common sense.