I hadn't heard that quote, and it seems to confirm my personal speculation (and hopes) then.
So, starting with the list from the 3e FRCS, where there are 57 human deities (including demigods), but not including Bhaal, Leira, and Myrkul, (who were... indisposed at the time, but have since gotten better.), but including Tiamat (who would better be listed among the draconic deities) and the four elemental gods (who were not in the PHB list, but maybe that's just an oversight or they've been demoted a bit) - hmm, I'll put that 59 (all but Tiamat). There are, as I said, 53 gods listed from non-human playable races pantheons, and then around 10 or so from the draconic pantheon, depending on which FR sources they use/ignore/amalgamate (my personal count is 13, but includes Saridor, who wouldn't likely be in due to gem dragons not being translated to 5e yet, and this could probably just be cut to Bahamut and Tiamat since we're talking about character patrons - the rest of the pantheon tends to be pretty draconically esoteric). That's putting us in the 120 - 125 range, which would definitely be a "tremendous wealth" of patrons, and actually put us at about 6 per page. And there are dozens of monstrous deities they could include, although that would probably not be necessary if this just for character patrons (if not, yikes, we could be up to 8 - 10 or so a page if they wanted!)