Hm... I Installed 12.04 B1 before it promptly crashed and corrupted my drive, but before that, it seemed much slower than a 32-bit version of 11.10 which I installed before. I bought a new drive, and installed 11.10 AMD64 on it, and again it seemed much slower that i686. Why?
Oh and it's a persistent flash drive I installed the Ubuntu OSs on.
Isn't it the computer's CPU that does all the processing? Is it the fact that the load of 64 bits is too much and 32 bits are lighter to transfer to the computer's CPU? I have a Intel Celeron something 64-bit CPU.