I find small hard cheeses VERY hard to age properly. They leave little margin for error.
Sailor - Can you give a little more info for why this should be? It seems like if the culture and process is good, sealing (wax, bagging, lard&cloth, etc.) is right, and aging is optimal then the cheese quality, whatever size, should follow accordingly. There are some very good small (4 oz, 6 oz, 8 oz) Goudas, Edams, etc., available in the retail world.
Are you referring to a particular cheese style?
-Boofer-