Gyrochronological age estimates as a function of log (τ_tidal), a very approximate estimate of the time scale for tidal interaction between the star and the innermost planetary companion. We note that the time scale for tidal interactions is uncertain by a few orders of magnitude. Systems with significant differences between τ_iso and τ_gyro (p< 0.05) are plotted with filled symbols. 55 Cnc (τ_iso ≈ 9 Gyr, log (τ_tidal/ y) ≈ 13) is not shown here.