Yeah, the Dirty Shirley songs that I've heard have been pretty decent. As you said, nothing groundbreaking, but still pretty good. I haven't heard the whole album yet, so I'm not sure that I want to buy it, but I've thought about it.
The Lynch-nerd / completionist in me has a hard time not getting everything that George is involved in. This dates back to the 80's when I knew nothing about Tony Macalpine yet bought his second album (Maximum Security) simply because I heard that George played on one of the tracks (Tears of Sahara). So, inadvertently, I've bought some good and little know music solely because of George.
Anyway, bottom line, I know that I'll end up buying this album as well, I just haven't done it yet.