I would have to say that there is a high probability that if he was OC'ing his gun, the crackhead would have waited to pester someone else. (Impossible to say for sure, Crackheads aren't exactly known for their wits and predictability) Also, it looked to me like his gun wasn't concealed on his person, but was inside the car, so it wasn't exactly a CC situation.
As far as tactical advantage of OC vs CC, that discussion has been had many a time. Personally I have a CC permit, and I know a lot of other folks on this forum do too. I'm a definate supporter of OC as a right, but I don't OC all day every day. It depends on where I'm going, what I'm doing, and what is most comforatable for me at the time. (Although I do think OC is much more comforatable in general and there is certainly a deterrent element that does not come with CC)
The only time when I would say CC has a tactical edge is if you know you are going to a place which is crowded (People in a packed space, bumping into one another like a can of sardines). I do get edgy about a possible joker trying to grab my gun from its holster when I'm in those sorts of situations. (I don't own a retention holster). In crowded spaces such as that your situational awareness drops significantly, and it's hard to track who is standing behind you/beside you. The only way to keep track of the gun on your hip is to place a hand on the grip. (Which freaks people out) so I'll usually choose to conceal it in those sorts of situations just for my own piece of mind (usually in a coat pocket where I can non-chalantly keep my hand on it if I need to).