The Firestone et al research is vindicated by new paper

At http://phys.org/print267179257.html … and see also www.sciencedaily.com/releases/2012/09/120918111320.htm … and of course, http://cosmictusk.com/pnas-younger-drays-comet-paper-lecompte-s/ … there is a new paper in PNAS that appears to exonerate the YD boundary event researchers and criticises the scientists too quick to do a write-up with the intention of debunking them.