When Litvak yeshivot mean to learn in depth, I think most people do not really understand what they mean. Even to me it seemed ridiculous. The first week in yeshiva you learn at most one page of gemara, And that does not mean to learn the commentaries at all. It means that there is inherent in the gemara itself that amount of depth that it takes at least a week of about 5 hours per day [in the morning session] to even begin to scratch the surface. And I freely admit that this really requires a very high IQ in the first place to see this. So when I was there just by force of circumstances I would read through all the commentaries that I could get my hands on. [For example the Shita Mekubetzet on the first page of Ketuboth is about twenty pages of tiny close lined print] but that was because I really was not on the level needed to see the depth on my ow,. And in fact never got there until many years later I began learning with David Bronson in Uman. and then I started getting the idea. [You can see a bit of this in my two booklets on Shas and Bava Metzia.]