Please don't cite evolution without fully understanding your claims. Evolution USUALLY works through tiny changes, but in certain situations the changes are dramatic and sweeping. If your proposed experiment was carried out, I would expect such a sweeping change. Further I would posit that a pre-mating barrier would form (in the form of contrasting mating rituals) and speciation would occur after sufficient time.

TLDR: Don't claim that Science supports your view if you don't really understand the theory.