Gamanit:
In fact it has become less and less common over the past several decades as Boro Park has become far more Chasidic than it used to be. BP used to be a real mix of Litvish, Chasidish, Yeshivish, and even MO but now Boro Park is 90+% Chasidic. And Boro Park women who drive are a small minority.
In any event, no one disputes that the frum in Williamsburg, KJ, NS, Meah Shearim and all the Chareidi areas of Eretz Yisroel have a virtually absolute Minhag Hamakom that women are not permitted to drive. So while you can nitpick about Boro Park, no one will deny there are Yiddishe Kehilos and neighborhoods where this issue does apply. So this is a relevant point and discussion regardless.