Jason, Vincent has said that he considers Dean's 1.2 to be the world record, and that there's no way he will ever beat it. So beating Hank or getting the "arcade world record" may not be particularly important. (Ross feels the same way about MAME vs. arcade.)
And just because Vincent is close to Hank on the scoreboard doesn't mean he's close, in terms of time and effort, to getting a score like that a second time. It took him weeks of hardcore play to get that 1,135. It would probably take weeks to match it. Maybe even longer, since he's out of shape on DK.
Running boards to get a kill screen is one thing, but playing at super-high pace is grueling and draining and frustrating and really time-consuming. You have to really want it.
It would be one thing if it were a guarantee that Vincent could beat his PB in a day, but that's not how DK works, especially for a really high score. Vincent beating his PB would actually involve some serious time and effort. The higher your score gets in DK, the harder it becomes to duplicate or pass it. At some point it stops being interesting. That point is gonna be different for everybody, but it looks like Vincent is at that point.
Actually, at least from my perspective on everybody, it seems that all the players on Dave's list (except maybe Ross) have reached that point!
Dean got the 1.2, Hank seems to either be uninterested or is waiting for someone to beat him, Ross is a "we'll see", Mark Kiehl looks to be happy with his score and would rather play other games, Eric Howard disappeared from CAG completely, certainly DK at least, Ben wants 1.1 eventually but isn't fired up about it, and I have no idea about Kyle.
(Curious how right I am on all of that...)