Yes, the overall sound is sharp. I'll grant that most of the songs are not subtle. Having expressed those cautions, let me say that this is a wonderful album. The songs are great fun and played with excellent style and energy. This is a band with some real musical talent. Brian's guitar work is, as always, extraordinary. He is a seriously underrated guitarist.
There are songs on here that do have subtlety, especially "Hollywood Nocturn," "Since I Don't Have You," and "You're the Boss." "Sleepwalk" is absolutely stunning. But mostly it's an album designed to make you want to dance. By now, we've all heard "Jump, Jive an' Wail" but "As Long as I'm Singin'" and "Let's Live it Up" are incredible. Even the remake of "Rock This Town" is a lot of fun (although I prefer the original).
While I think "The Brian Setzer Orchestra" and "Guitar Slinger" are better overall (with "Guitar Slinger" being the best swing album I've ever heard since the days of Enoch Light), "The Dirty Boogie" is excellent. If you like swing, this is a great one to have.
One final note: if you ever get the chance to see Brian Setzer live -- GO! He is a fabulous intertainer.