The Apple Keyboard II (short keyboard that shipped with Classics, LCs, etc) was also made in various parts of the world. The Mexican-built keyboard was again mushier than any keyboard assembled in Asian countries. I get a feeling the factory in Mexico used different parts (similar to the Taiwan vs. Malaysia vs. USA mouse discrepancies in the original ADB model).
It makes me curious as to why Apple cannot control something like this. All of the factories are owned by the same corporation; one would think the products would be the same.