No. On the rare occasions Banky and I have conversed away from an audience, he's been a regular, frankly amiable guy. The Banky persona, in it's own way, isn't that different from an Incandenza or even an IDrinkRatsMilk in that it's a combination of id, disrespect and invulnerability. However, through some mixture of oversaturation, staleness and sheer longevity, he's allowed Banky the poster to feed off of it's own hype and I think it can now operate under it's own will. So, Banky is Frankenstein, but when he steps away from the computer he's regular old Jeff again.
In the old days you could see him crack and his real personality come through occasionally.