  In usual diffusion, the concentration profile, starting from an initial
distribution showing sharp features, first gets smooth and then converges to a
Gaussian. By considering several examples, we show that the art of convergence
to a Gaussian in diffusion in disordered media with infinite contrast may be
strikingly different: sharp features of initial distribution do not smooth out
at long times. This peculiarity of the strong disorder may be of importance for
diagnostics of disorder in complex, e.g. biological, systems.
