Sorry, but you are way off on that one. The use of Doctor as an academic title dates from the founding of the universities in Medieval Europe. Before these were regularly organized, any teacher who gathered about him a number of students was a doctor, dominus, or magister. During the first half of the twelfth century, the title Doctor acquired a more special significance, though it still implied personal excellence rather than official position. In the latter half of the twelfth century a group of doctors in Bologna formed a collegium and they prescribed conditions on which other persons might become members of the teaching body, and thus laid the foundation of the system of academic degrees. The doctorate was first granted in civil law, later in canon law, and, during the thirteenth century, in medicine, grammar, logic, and philosophy. In France and England it was long confined to only the faculties of law and divinity.

Regarding your claim that the Doctor of Jurisprudence is an "american attempt at oneupmanship (sic)", the foregoing clearly demonstrates that the title pre-exists America. Additionally, in many European countries, lawyers are given the title of doctor (e.g. Dr. Diesel), whereas in America they aren't.