Before revision:  These phenomena (as well as the convergence rate \lambda_2) are found to exhibit optima for intermediate \omega, and we explore their relation to imbalances for the intralayer degrees of nodes .
After revision:  These phenomena (as well as the convergence rate \lambda_2) are found to exhibit optima for intermediate \omega, and we explore their relation to imbalances for the (intralayer) degrees of nodes .