I was a neuroscience major and neglected everything in biology that wasn't relevant to the nervous system. Most of my classes in college were psych and neuro classes. I found the bio section to be pretty easy when I took it.
What I DID have though was four years of very productive research experience, two research methods classes, four classes with large statistics components, a seminar/journal club course, and a graduate neuro course that threw 100-300 pages of journal articles at us per week. With that level of research exposure I found the experiment-based passages (ie the whole section) to be a joke.
If a person still has at least a semester to go before they need to take the MCAT, I would highly recommend joining a journal club and being very active in the discussions. That should teach you how to critically read research, and it will make you happy that the MCAT focuses so much on critical thinking and experimental passages instead of detail oriented recall.