Absolutely true- he has the rare ability to feel and sense what the
airplane's doing, and can eke out every last ounce of performance and
energy. (The other person I've flown with who had the same ability was
Nikolai Timofeev)

Bill also helped me get my tail dragger endorsement, as well as a
substantial amount of acro training, and in fact helped me find my first
plane. The list of items where he has helped others learn could go on
forever.