Is your Best Teacher the Best Teacher No matter What Grade

I am currently reading the book "What Great Principals Do Differently" by Todd Whitaker.

There are many points in the book that I agree with but there are a number of points that I disagree with. One of those points is that Whitaker says that your best and highly effective second grade teacher will still be your best and highly effective teacher if you move that teacher to fifth grade.

My experience has been that certain teachers may be highly effective in lower elementary and once you move them up they are no longer as effective.
What are your experiences? Please share