I am sure you are right, Tunesmith, and I agree that anyone trying to sound like anyone else can be silly unless they have the talents of Mike Yarwood or Alistair McGowan. However, it is my opinion that neither Plant nor Marriot were trying to impersonate anyone. They had no need. The fact that some people in a minority magazine readership believed that they sounded like blues singer is not the responsibilty of the artists. They were not acting. They were being themselves.