a) Distributions of velocity ratios u = V/V_c of the program Be stars corresponding to three MS evolutionary subphases, which are indicated in the inlay. Each group has roughly the same number of stars. b) Distributions of velocity ratios u = V/V_c corresponding to three MS evolutionary subphases of the same duration, which are indicated in the inlay. In each block, the normalization is made by adding the area of all three distributions.