I mean by now it should be clear that as far as timelines are concerned one really needs to heavily discount what NP says and usually apply a lofty "safety-margin"... I mean what important event (BLA, BTD, licensing deal...) has happened as originally projected? It will get done though, eventually.
Not (always) his fault and his optimistic projections are all part of the game being a small company at OTC: keeping SH interested/hyped.
I'm always in for a pleasant surprise of course, but don't think end of May is realistic at this rate.