Do you mean they are generally happy with the ages that guys and girls start to date and think it is a good an appropriate age to start dating? Well, I should hope so.
As one example, this:
midwesterner
Member
For the record, one of my roshei yeshiva was approached to sign as one of the original 70 and refused. He holds that girls should marry as close as possible to the spiritual high they are on when returning home from seminary in Israel. The longer they are back in America, the more their hashkafos get diluted. Remember they are not in Yeshiva like the bochurim. Most of them are out in the world, and being exposed to religiously compromising influences. So I can assure you, he does not hold of this one either.
To add another: The RY are happy that girls are in greater supply than boys. This causes the price of boys to go up, and more boys can force support, which allows them to learn longer (and stay out of college while they are in Beis Medrash, knowing that they will not need to support themselves to get married.
As I have said before, those & other “causes” may be the correct Derech for Klal Yisroel. That is for a Gadol to decide, not me.