  Using rather general consideration I argue that the numerical impact of the
existing next-to-leading logarithmic summations of terms $\log{m_b/m_c}$ for
perturbative factors $\eta_A$, $\eta_V$ in the exclusive zero recoil
semileptonic transitions is irrelevant, and adopting corresponding corrections
beyond the exact one loop result for both estimating the values of these
formfactors and their theoretical uncertainty, is misleading. The central
theoretical value if taken literally is then $\eta_A\simeq 0.97$.
