Looking at citations from 2001 on, and controlling for different numbers of notes in each journal by dividing by the count of all published notes from 1995 on:
Harvard: 358 citations.
Yale: 106, with 78% of the number of notes in Harvard.
Stanford: 48, with 40% of the number of notes in Harvard.
I count here only articles denominated as "Note" (not "Recent Case" or some such), and citations that refer to them as "Note." There are a few false positives and surely some false negatives in each query, but I have no reason to think they'd throw the results off.
I hope in coming months to have much more comprehensive data on this and more.
In fact, the marginal work for the professor in particular may be negligible, insofar as it is just a matter of stating a different number to the relevant RA.
Of the top-ten, one of the authors of a seminal paper from the mid-90's made the list, though which author changed year-by-year. I'm pretty sure the high ranking was driven by one paper, with the rest of their corpus making the small contribution which determined who was in the top-ten.