It has been shown that nanostructured composites polymer/organoclay can be divided on three types: microcomposites, intermediate and true nanocomposites. Belonging of composite to any type is defined by organoclay structure. The transition from one type of composite to other one results in strong changes of elastic modulus. The reinforcement degree of nanostructured composites can be described by the same percolation relationship, but having different critical indices.