Score has no direct relationship to the victory conditions in the current game. Score looks to me to be most closely tied to how many planets a player controls, and thus it is likely Breender went on a colonization and/or conquering spree, but did not then strive for one of the victory conditions. On a related note, Raven proved a researcher could win playing just a few times a day at 10 minutes a pop (roughly three 10-minute logins per day). This would likely result in a relatively low score, but filfilling the victory conditions.

That said, I realize I am not addressing your other point that he might have "had more", which I assume he mean more blackholes created. I'm sure that information would show up in the server code though.