  We study the transparency $\cal T$ of nuclei for nucleons knocked-out in
high-energy semi-inclusive $(e,e'p)$ reactions, using an improved theoretical
input, discussed by Nikolaev et al. We establish that neglect of
$NN$-correlations between the knocked-out and core nucleons reduces nuclear
transparencies by $\approx 15 \%$ for light, to $\approx 10\%$ for heavy
nuclei. About the same is predicted for transparencies, integrated over the
transverse or longitudinal momentum of the outgoing proton. Hadron dynamics
predicts a roughly constant $\cal T$ beyond $Q^2\approx $2 GeV$^2$, whereas for
all targets the largest measured data point $Q^2$=6.7 GeV$^2$ appears to lie
above that plateau. Large error bars on those data-points preclude a conclusion
regarding the onset of colour transparency.
