Now I've read Kyle Gann's blog for enough years to know he's not much for Penderecki's post-Threnody music. I actually kinda like some of the later Penderecki, though a lot of it got awfully ponderous in a neo-Romantic vein for my tastes.
That said, I think his work for solo tuba is fun.
Maybe the challenges of writing for solo tuba forced him to think outside of his pointillistic/expressionist and neo-Romantic boxes or something but among tubists/tuba players however they prefer to be known Penderecki's work has become one of the standards of the tuba literature.
I think tonight will be a tuba themed night for blog posts.