Based upon the above responses, you might want to elaborate a bit more. If you are looking for a scripter/scenario developer / test executioner as opposed to a consultant who can lead the entire process to make sure the test assets serve to answer established questions about performance; then the skill sets need to encompass more.
My own recent experiences show that only one in forty resumes' touting this discipline have significant amounts of truth. Your concerns are correct based upon my experience. If you ever cruise the LoadRunner forum, you will see a surprising amount of evidence to support your concerns.