The calculation is rough and ready, and I come to slightly lower numbers than Allwood and co, but the point is that this measurement uses a unit we're familiar with - us.
People who do actually know their physics have made the same point: that what has been discovered is a measurement error, not a flaw in the basic theory.
However, from the analysts point-of-view they might as well be forecasts since the actual measurement of those events in some cases has not even begun.