Defending your BB in Limit

[uuDevil]

From the article:

[ QUOTE ]
...when I’m in the big blind, I’m showing an overall loss of less than one big blind with 140 of my 169 hand combinations — meaning that as of now, I do better by calling with those 140 combinations than I would by folding them. To me, this is a pretty strong indicator that all of the people who advocate a loose blind-defending strategy are on the right track.

[/ QUOTE ]

This isn't clear to me. Is he referring only to hands when his BB is raised? Otherwise, this doesn't seem like a good argument at all.