For a little insight as to why there was a determination of a need for smaller catch sizes of largemouth bass in Falls and Jordan lakes, visit the below links. These assessments offer very detailed findings from largemouth bass samplings at each location.
http://www.ncwildlife.org/Fishing/documents/Web_Summary_Falls_2010.pdf
http://www.ncwildlife.org/Fishing/documents/Web_summary_Jordan_2010.pdf