I am surprised by some of the responses, especially from CT Lawyer. What makes IVY Leauge colleges the “Top colleges”? Is it not how hard it is to get into? Don’t children of alumni get special privileges there too? Do you really think a major donor to one of the colleges will not have an easier time getting their kid in? Granted their criteria may be different than yeshivas but there are many parallels.
We also need to address the question based on the meaning of the questioner. He probably meant which have the smartest guys. I believe that anyone with seichel realizes that this means little when it comes to what really counts. Those things are much harder to quantify. Such as
middos development
growth development (A yeshiva whcih takes a boy from level 1 to level 6 should be better than a yeshiva that takes him from level 9 to level 10)
connection to Hashem
ability to think about and deal with real life issues including emunah and bitachon
breadth of knowledge (some yeshivas produce guys who know many achronim on shas but are ignorant of halacha)