Jack Metzler has published Top Ten Supreme Court Oral Advocates (Selected Categories). Here is the abstract.
Scholars have noted the rise of experienced oral advocates in the Supreme Court, but until now, the discussion has focused on the simple number of arguments that an advocate has given before the Court. But a simple tally can both overestimate and underestimate an advocates experience. The paper uses data gathered from the Supreme Court's daily calendars and the SCOTUS Search database of oral argument statements to determine top advocates by such measures as argued words per minute and statements per 30-minute argument.Download the essay from SSRN at the link.