It is not my intention to find out. But, I would assume so - to be perfectly honest.
This goes to my point, once more, since this is the only space "we" users know David in, it is fair to assume that this is indeed how he is. I spent time on IOTA chat also and it was only marginally better there, so again, because everything is run via stealth mode, I have no way to gauge how or what his behavior would be like in "professional" settings. But, his behavior has been this vile on here on IOTA chat, on NXT, etc.  

If you want to risk your own contacts, then go ahead. For me, I'm just happy that the software has been shaping up nicely and that technical issues seem to be solved at an impressive rate - I'm sure David is part of that as well and I thank him for his contributions there. But, as a face of the project, I have my concerns about his ability to communicate with others (as I've made clear 100x before). I hope you are right and that his behind the scenes communication is stellar and great and thoughtful - I'm just not in a position to tell. Neither are others who have also shown concern about this very issue.

But, enough about this. Let's just agree to disagree on this issue and move on. I fully support the software and IOTA's technical vision.