cosmology - following up dark matter accretion in supermassive black holes

A while ago, there was some conspicuous evidence that supermassive black holes didn't seem to be eating dark matter at the expected rate of 70%-30%, in fact, only 10% of the black hole mass increase could in principle be attributed to non-baryonic mass.

Was there some follow-up evidence for or against this observation? because it is 2012 and every astrophysicist that is out there seems to be happy and dandy about dark matter, despite this huge clue (together with MOND, and the negative results from CoGENT) that dark matter doesn't actually exist