  We apply random-matrix-theory (RMT) to the analysis of evolution of
wavepackets in energy space. We study the crossover from ballistic behavior to
saturation, the possibility of having an intermediate diffusive behavior, and
the feasibility of strong localization effect. Both theoretical considerations
and numerical results are presented. Using quantal-classical correspondence
(QCC) considerations we question the validity of the emerging dynamical
picture. In particular we claim that the appearance of the intermediate
diffusive behavior is possibly an artifact of the RMT strategy.
