Beyond 'BS" at Work: Is Straight Talk the Answer?

Should we call people's BS always, sometimes, never, when it arises at work?

How many lies or half truths have you heard in the past week?

Stefan Stern (FT, August 11) thinks We should recognize value of BS.
He was prompted to comment on the topic after receiving a copy of Beyond Bullsh*t, Straight-Talk at Work (Stanford University Press) by Samuel Culbert, a professor of management at the University of California in Los Angeles.

So what's your take, brutal honesty vs political survivors and all the shades of Grey in between...