Wouldn't sit too well with me and I'd hope that the actual crew would spend some time to make sure everything was kosher.
Perhaps the printouts contained information which informed them of that key data? No experience here (non-pilot) but I do often find it quicker to read than type....
While likely not SOP, I do admire the non-rev pilot for taking initiative, both in speeding up aircraft departure as well as welcoming its pax.
Pat