I just measured my table again. The side pockets have openings between 4 3/4 and 4 7/8, more like 4 13/16. The shelves on the corner pockets are 1 1/2" deep in the middle of the pocket and 2" deep at the edges of the pocket opening. They will definitely hang a ball that contacts the side rail going in at any speed above medium slow. You can slow roll a ball and it may fall after touching the side rail close to the pocket, and then again it may not. Bottom line, you must hit these pockets cleanly or they will stand up on you. I really notice it on long rail banks. You can hit one good and if it touches that side rail anywhere it's not going in.
I've seen Shane and Dennis fire balls in and run out rack after rack while practicing on this table, and I've also seen both of them miss very make-able shots from time to time. You MUST concentrate fully on each shot here, even the "easy" ones.
By the way the TAR table had 4 1/8" corner pockets and it was a terror. I saw many good players get very frustrated playing on that table. The best I ever saw there was Francisco. His concentration is the best!