usability testing - Does anyone have statistics on usage of the Kano Model?

I have been asked by a client to provide justification for the usage of the Kano Model.

I believe I have sufficiently convinced them of the benefits and value, but the one thing I am lacking is statistics to prove that this is a widely used model in the UX industry.

Have there been any surveys on usage of Kano or at the very least is there a list of companies using it for product development?

Any information you can share would be immensely helpful.