Eh, the commission I did for Brady Games creating the multiplayer maps for Activision Call of Duty: Advanced Warfare strategy guide required that I send them layered PSD files as final output (even though the maps were completely designed in XDP9) since they might need to make changes (mostly alterations in labeling) if necessary and they use Photoshop and InDesign (Mac versions) for page layout. That's quite standard in the professional print industry.