Well, this isn't new bike delivery...it's after a service. But I'll agree with you, it would be bad business to release a bike out of service all yucked up.
when I say delivered I mean returned to customer after a service . . . even if it "only" was an oil/filter change or a minor check up . . I would alwayz clean the bike and if it was NOT a service, and cusgomer wanted bike washed, it would cost him . . .$15.00