Client wants a “pro tools mix” they can have it, of course, but my guess is that, in a good number of cases, the creative work was done in Cubase. I honestly think that Cubase is something of a “dirty little secret” and is used by lots of “famous” people who won’t cop to using. (TIC ) But, honestly, based on what I’m hearing on the charts and in film/tv music (shows and commercials), lots of material, much of it excellent, sounds like it was done in Cubase. Maybe that’s just me thinking, “how could I do something like that in Cubase?”
I’m guessing Logic and some of the other leading DAW packages share this issue to some degree.