Was the US Navy jealous that Britain had jet-powered Nimrod while it operated Orion?
Short answerIt regarded Nimrod as a very good specialist aircraft, though that does not make Orion an inferior fleet solution.
NotesThe comparison is more complicated than American envy of a British jet. US Navy observers regarded Nimrod as a strong specialist maritime-patrol aircraft. That reputation rested on the aircraft's mission role rather than jet speed alone. It also does not make the widely used P-3 Orion an inferior fleet solution.