On Wed, 20 Feb 2013 22:43:58 +0000, Dr J R Stockton
wrote:

The Russian object could have been a fragment of almost anything,
including (but not especially) DA14. But it could not have been a
recent fragment of DA14.

That is the key point, since without it being a very recent fragment,
it would be wildly unlikely that both the fragment and the parent
would arrive here at the same time. As unlikely as any other pair of
objects (which also shows the error of assigning odds to
coincidences).