The very first Litvak Yeshiva I was at [Shar Yashuv in N.Y.] emphasized learning in depth along with lots of review. And recently I have noticed that this seems to be a  correct approach for me. I might go through a Tosphot or a piece in the Avi Ezri or the Chidushim of Rav Haim of Brisk and not understand a word even if I do it lots of times. The only way that I seem to be able to get the idea is when I go through it from beginning to end, and the next day I do it again and so on and so forth the next day--- and this might go on for weeks or a month.  I know this is not how anyone else learns, but this seems to work for me. 

And I noted this idea of review also in Mathematics and Physics. It seems to help if I do one whole section many times over a long period of time.

Later I was at the Mir for a few years and there the emphasis was a bit different with the afternoon being devoted to fast learning. There that was not just saying the words and going on, but it was fast in that one would do Tosphot a few times and then go on.