  The body of experimental measurements of intermediate-energy reactions that
remove a single nucleon from a secondary beam of neutron- or proton-rich nuclei
continues to grow. These data have been analysed consistently using an
approximate, eikonal-model treatment of the reaction dynamics combined with
appropriate shell-model descriptions of the projectile initial state, the bound
final states spectrum of the reaction residue and single-particle removal
strengths computed from their wave-function overlaps. The systematics of the
ratio $R_s$ of the measured inclusive cross-section to all bound final states
and the calculated cross-section to bound shell-model states -- in different
regions of the nuclear chart and involving both very weakly-bound and
strongly-bound valence nucleons -- is important in relating the empirically
deduced orbital occupancies to those from the best available shell-model
predictions. Importantly, several new higher-energy measurements, for which the
sudden-approximation aspect of the dynamical description is placed on an even
stronger footing, now supplement the previously-analysed measurements. These
additional data sets are discussed. Their $R_s$ values are shown to conform to
and reinforce the earlier-observed systematics, with no indication that the
approximately linear reduction in $R_s$ with increasing nucleon separation
energy is a consequence of a breakdown of the sudden approximation.
