Ohh duh, sorry about that. I had totally forgotten that I posted that.
The abstract (
http://136.145.83.33:8000/jspui/bitstream/10476/468/1/pag.11.pdf) says that the brix ranged from 19.52 to 27.54, the viejo at the low end and one called "felipe mayo" at the high end. The viejo was most productive, with an average of 5.6 fruits per tree per month -- however production in terms of weight was a mere 21.92 kg per tree. On the other hand, a cultivar called "adelantado #2" showed a production of 4 fruits per tree per month but with an average production weight per tree of 42.64.
So, in terms of raw brix, the winner was felipe mayo (never heard of it).