My bb knows all 26 alphabets, saying only 'A, E, I, J, K, M, N, R, S, X'.
He also says his own name, knows shapes, colours , sizes and most of the things around us. His interest is especially deep on vehicles.
Actually I think those who havent known all these are just havent been tought/exposed to these knowledge yet. Toddlers are very quick at learning, you don't have to purposely sit down and lecture them, just point them out and name them when you see things.