Those 5"-6" YP were one year old fish. Good amount of food can easily result 7"-10" YP by year's end after a March stocking. Smaller one of this group will be mostly males and ones larger than 7.5" are mostly females and carrying eggs this spring these these perch will appear very plump. Relative weight for these perch in early spring (prespawn) will be biased due to egg carrying fish. Catch a few of them in mid March and see what is present for plumpness.
aka Pond Doctor & Dr. Perca Read Pond Boss Magazine - America's Journal of Pond Management
