[fnordsensei]

Not only that, but (speaking from personal, anecdotal experience), most of the benefit as it applies to work tasks will be realized over time, for outcomes where consistent and sustained focus and stress management is most beneficial.

That being said, what the mindfulness movement tends to gloss over is the fact that, with enough determination, meditators will occasionally shake loose deep-seated mental gunk, resulting in better quality of life if processed, but sometimes with a tumultuous period while dealing with it. Naturally, performance in other areas of life might drop during such a period.