I don't think I'm being overly critical when I say that kind of thing is pathetically amateurish. That's at best, at worst it's someone just intentionally being lazy or f*cking a client over for more money. Anyone who is taking people's money to record should know how to bounce tracks down to wav files and not just have a Pro Tools session with hundreds of chopped up takes. 6 or 7 years ago I had a friend record my old band with a Mackie Onyx board running into a laptop, using I think PT LE or Acid or something. He was able to bounce the tracks down to stems (stereo pairs of each instrument group) and burn the files on a CDR for me to mix on my old Akai HDD recorder/mixer. 10 years ago I recorded projects on a 16 track and was able to send them out to get mixed. I was able to mix projects on my current rig that I recorded with my old one, using a completely different DAW. It's pretty standard practice traditionally to have a different engineer for tracking and mixing. Not having the ability to send tracks out to a mixing engineer, not having them ready at the conclusion of the session without being asked even, screams "I don't know what I'm doing!". If they can't handle that, why the hell would I want them in charge of something that actually requires skill, like mixing the damn song?
Sorry for the rant, that's one of my hot button topics.