Is Bird Shot Adequate for Home Defense?

FMG Publications recently posted the below video featuring American Handgunner's Roy Huntington.  He talks about sporting guns for home-defense and looks at how different loads — No. 8 Shot, 00 Buck and No. 1 Shot — hold up in a sporting shotgun, and specifically addresses the question of whether bird shot is adequate for home defense.  He says ultimately you have to decide for yourself based on your own circumstances.