real-brisker
I have learned both Iyun and Bekius and I know plenty of Daf Yomi Yidden that can wipe the floor with Kollel Yungerleit. Many Kollel Yungerleit know a few daf in a few mesechtos Beiyun. Thats am haaratzus.
A few years back Rav Shmuel Berenbaum ZTVKL spoke at Lakewood and told the Oilum they are Oiver on Bittul Torah for going so slow. They all scoffed at him. You think anyone took him seriously? Theres a reason why we arent producing American Gedolim.
In the Mir Yeshiva in Europe pre and during WW2 they covered serious ground and learned Beiyun. They also did Chazara. It was not uncommon for the same daf to be reviewed 10-20 or more times. Today try to get someone to review something 3 or 4 times. Its so hard…