He was "attacking" NEOP on many fronts this was one of at least three that I recall. Two others were they were presenting data differently (different n) and with such a borderline p value it could get nudged above .05. Another was the commercial success if approved (that topic was discussed a lot on this board and I think the reason xrymd thought it a good short). So in short (pun intended) I think he thought it a good short for many reasons. I don't know his initial price but the time of the first article was in the ~4.50 - ~5 range so if one shorted then they would have done pretty well.
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