Ive noticed this myslef in the past, the business checkin at LAS is very slow. Once it took over 45mins to get a group of people checked in, but i later found out they were staff and the reason for the delay was they were checking to see how many C seats were left unsold, and how many no-shows they had. Still, even regular pax seemed to take a long time to get checked in. This isnt a one off. Ive done LAS-MAN a few times and it always seems to be slower than most other checkins.