Meanwhile, all this back-and-forth about whether quips are "realistic" or not begs the question of just how much it matters that the dialogue be "realistic," as opposed to, say, clever, entertaining, amusing, dramatic, etc.
We shouldn't just assume that "realistic" dialogue is automatically better than more stylized dialogue. Indeed, it can be argued that theatrical dialogue isn't necessarily meant to be literally "realistic" (otherwise, there would be a lot more mumbling and rambling) but memorable and effective and, well, theatrical.
Heck, when you think about it, how are quips somehow more "unrealistic" than your usual Star Trek technobabble, let alone Kirk or Picard or whoever being able to speechify eloquently at the drop of a hat? Dramas and comedies are often pitched at certain heightened level of reality, to varying degrees.
Bottom line: Sometimes it's more important to be fun than believable.
