I never did understand why artists, or commissioners for that matter, have such a hard time responding and keeping up to date. Course, I can understand a bit of delay, since things happen, but most of the time it's just ridiculous. It bothers me a lot when I commission someone or do a trade with someone and never get replies when I ask for a small update :<

I mean, I try to answer things as soon as I can (though I'm online almost all the time). If I'm sick or can't work for a bit, I let people know.

I hope he gets your art done soon :< Good luck!