Newb question: are there DSes for the world championships? Do the coaches for each country act as such?
Yes and/or no.. Depends how high level country the one is. DS's that work in a WT/PT/CT team may work in a Worlds as a DS for the national team. Or not. Coach may be a DS for a small cycling country national team. In a big cycling country DS can be high level ex WT pro and assisting DS same and coaches are doing just coaching and some general team management stuff.