Singlet exciton diffusion is a ubiquitous process in organic electronics with important implications for light harvesting, namely in photovoltaic applications . In the usually prevailing picture of disordered organic semiconductors, exciton transport is believed to occur via a sequence of thermally-activated hopping events between individual molecules or polymer chains, ultimately holding back transport over large distances during the relatively short ( ) singlet exciton lifetime . While the use of advanced synthetic methods has allowed the preparation of molecular and polymeric materials with low degree of static, extrinsic, disorder , organic semiconductors are soft materials that suffer from dynamic (vibrational), intrinsic, disorder prompting spatial self-localization of the energy (and charge) carriers under the form of exciton-polarons (polarons) . The recent report in highly organized conjugated nanostructures of exciton diffusion coefficients exceeding 1 cm 2 /s, that is orders of magnitude larger than expectations based on incoherent hopping transport, is therefore an important breakthrough, but one that has remained elusive so far .