It seems that ignorance is abundant, and that saichel has gone to sleep. These generalizations are silly, even childish. There are girls who are ready for marriage before seminary, and there are others who aren’t ready even after it. No girl shoud get married because of her biological age, and no one should enter a marriage bond just because others from their peer group do. It’s an individual thing. I am aware that many a parent will begin to address the subject of marriage when a child reaches a certain age. But that doesn’t tell us a bit about readiness.
Quite a few of the broad strokes in earlier comments are nothing shy of ridiculous. Some girls emerge from seminary with zero enthusiasm about Yiddishkeit, while others are brimming over with spirituality. There are so many variables that determine the health of a marriage that focusing on one or two speaks little for intellect.