Viz., what amount of productivity in the US economy has been sacrificed this week by people playing with G+ and trying it out? I will be the first to say that mine has been somewhat impaired ... on the other hand, short term versus long term, I think in the long term it will contribute to productivity, or a decent chance that it will. I plan to post another day on comparisons between the two, but for now let me say only that in a lot of ways G+ and FB oddly complement each other.