I've never heard the expression Dry Drunk, but it makes me nervous for my own situation. After a threat of leaving him, my husband quit drinking altogether (6 weeks ago, and then again 2 weeks ago) without a program or other support. I wouldn't describe him as impulsive/judgmental, etc., but I know his quitting drinking isn't going to solve all our problems. At the very least, he needs some individual therapy in addition to the marriage counseling we're trying now.
Good luck to you all, and to myself!