A busy airport like ATL is no place for such taxi instructions either. Especially being told to wait for a Delta in a Delta hub!!!! It's like in EWR when you are told to follow the 737 when there are 20 of 'em rolling around. I've been given pos. and hold behind landing traffic but never a runway crossing clearance behind an aircraft taking off. That is an unusual taxi clearance that anyone could screw up in my opinion.