Comparison of the wind properties of the BHGs to field BSGs (plotted according to spectral type), LBVs of temperature selected to match the BSGs ( ≥ 15 kK) and those of comparable luminosity to Cyg OB2 #12 (log (L/L_⊙) > 6.0). Data from Crowther et al. (2006), Searle et al. (2008), Najarro et al. (1999, 2009), Clark et al. (2009) and Groh et al. (2009a, 2009b). Inclusion of later BSGs continues the trend to lower mass loss rates and wind velocities (e.g. Markova et al. 2008). Due to the uncertainty in the wind velocity for Cyg OB2 #12, we present 3 pairs of possible values for v_∞ = 300,400 and 1000 km s^-1 (Sect. 4.1).