I've said it before, and I hope to say it many, many more times – when you have two people doing a puzzle at the exact same time, it can go very, very quickly. Frannie and I worked together on this one and went easily from top to bottom with very few wrong guesses. I put in "doeth" for DOEST (25D: Biblical verb) just off the idea that the first letter would be a D (it was), but it wasn't hard to fix once we read 44A: Dog that bit Miss Gulch (nice clue!) (TOTO).
Another good thing about having two people looking at a puzzle is that when one (read: me) says to the other (read: Frannie) that he doesn't think there's a theme, that other might say something like, "Well, there is something going on with STRONGWEEK (17A: Good stretch for the Dow), and THEYREHERE (59A: Cry accompanying the arrival of visitors). And whaddya know? She's right. Homonym opposites. Very clever Mr. Sullivan. The other two are nice, too: HIDDENSCENE (23A: Extra after a movie's credits, perhaps), and BRAKEREPAIR (50A: Midas service).
All in all, it had very little junk. The classic YSER (37D: North Sea feeder), and ARG (5D: Falklands War side: Abbr.), and ENO and YAO... but really, quite clean. Even those aren't bad, just somewhat common in crosswords.
Lastly, if I didn't know better, I'd think Will Shortz is playing his own little game with day-to-day carryover. Consider "27A: Try to impress at a party, say," the answer, NAMEDROP, was the theme of yesterday's puzzle. I've been complaining a bit lately about the same words being used in subsequent puzzles, but now I'm starting to think it's intentional! I don't have sufficient proof yet, but I'm going to be on the lookout. An explanation like that would be surprising, but oh, so satisfying. Here's hoping!
p.s. I forgot the theme answer that's right in the middle! LOSTONE (39A: 2006 Jay-Z single).