I saw Paul tell someone that muscle maintenance consisted of getting in the gym and hitting one or two sets and that’s it. You don’t have to kill a muscle to maintain it.
Here’s T-Nation’s take on DC.
I just started a DC inspired program but it’s way too early to judge it. I’m doing an A/B split three days a week. I’ve split it differently than DC because there’s a lot I can’t do right now with my shoulder. I’m doing a push/pull split. I have an A1, A2, A3, B1, B2, & B3 day and each uses different exercises (like DC).
I think it’ll work for maintenance. Is it enough for growth? I don’t know, but to be honest nothing really works for me these days. I’m past the days of rapid, noticeable growth.