I'm not looking to start any arguments, but I just want to toss out a little "food for thought".
For DECADES, it's been well documented that reductions of restriction(s) in the flow path, both intake and exhaust, will allow an engine to breathe better, therefore generate more power. Yes, most of the gains will be noted in the higher RPM range, when maximum airflow is trying to be achieved, in order to generate maximum horsepower. Therefore, some of the modifications that are made, don't necessarily manifest themselves at lower RPM.
Having said that, by implying that a flow enhancing cold air intake does little for performance, may not be all that true. If it was true, then exhaust headers, and/or "porting and polishing" the cylinder heads would also be of little value. It is generally known, however, that these modifications do indeed provide performance gains. Whether or not they'd be worth the effort, when done to the engine of a 5000 pound vehicle, however, is another story. Jeep Grand Cherokees are not generally known as "performance vehicles"........