2 Workers before a Settler

[shakabrade]

If there is snowballing from earlier worker there is also snowballing from earlier 2nd city.

Totally right. What early 2nd city cannot do is early burst production needed for e.g. defenders and fogbusters, compared to chopping workers, until it is set up for whipping. And it takes a while until you can whip it plus building a settler is a bit longer, one chop longer. Definitely depends on the quality of 2nd city though.