There are anecdotal observations and theoretical arguments that support the vibration theory. But all aspects of it can be explained using less exotic models of ligand-receptor interaction. Proponents of the vibration theory are ignorant of those alternative explanations. The experimental evidence does not give a conclusive picture, either. Some experiments have clearly falsified aspects of the vibration theory, whereas the key experiments that support it suffer from systematic weaknesses.

Therefore, unless texperimental evidence appears that clearly supports that olfactory receptors perform electron-tunneling spectroscopy, I remain unconvinced.