I would have to agree with that as well. The higher up fish are almost always the ones that are flying up to the jig as fast as the jig is falling. Usually the tighter to the bottom they are the more you have to work for them. But the other big thing I have found is competition really helps the bite. Single fish tend to be able to resist eating better than fish that are with other fish and competing for food. I have had days where unless I see multiple marks together in a hole I won’t even drop I will just keep moving even if they are off the bottom, but every lake and every day is different.