First, despite how it’s typically portrayed in the anti-intelligent design literature, I maintain that Behe’s irreducible complexity argument is not a God-of-the-gaps argument at all. Behe is not saying that we don’t know (or can’t know) how irreducibly complex systems like the bacterial flagellum could plausibly arise naturalistically. Instead, Behe is giving positive reasons that the sequence of events that would have to happen for irreducibly complex systems like the bacterial flagellum to arise via an undesigned process is an improbable sequence, and hence the design hypothesis should be taken seriously. p. 115.
Anyway, do people other than Christian Darwinists use the expression “God of the gaps” seriously? Isn’t the real world dividing between self-organization of life and design of life?