  B.S. Davids {\em et al.} make the explicit assumption that radiative widths
of analog states in \ne22 and \mg22 are equal. We demonstrate that this
misapplication of iso-spin symmetry leads to very wrong results. Considerations
of elementary nuclear structure suggests that such an assumption can be
inaccurate by a large factor (in \mg22), as is evident from a comparison with
recent measurements of radiative width in \mg22. Estimates of radiative widths
from analog transitions are common but often wrong (e.g. in \mg22) and should
not be considered a useful tool in nuclear astrophysics.
