have been measured by Noda et al. [@Noda] from the width $\Gamma\propto k_{\perp}(t)$ of the (110) X-ray diffraction peak. Close to $T_0$ the width as a function of time develops plateaus qualitatively similar to Fig. 5c. Their data, however, refer to $T_f/T_0>0.981$, whereas ours are for $T_f/T_0\lesssim 0.976$. Also one should note that experimentally the ratio $T_{sp}/T_0$ may be sample–dependent. Because of the sensitivity of $\tau_{inc}$ to temperature differences with respect to $T_{sp}$, this introduces considerable uncertainties in our comparison. Nevertheless it is interesting to present experiments and simulations in one plot, as done in the inset of Fig. 6. There the simulation data were linked to the physical time scale exactly in the manner described towards the end of section \[MODEL\]. Both sets of data display a remarkable similarity with respect to the order of magnitude in time and their trend with temperature (and even seem to be a continuation of each other). We conclude that the connection between time scales for diffusion (see section \[MODEL\]) and nucleation as implied by our algorithm roughly agrees with experiment.

Coarsening regime and scaling \[COARSENING\]
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As pointed out in the preceding sections, the distances between high– and low–energy walls define two 