I have been drinking Pepsi for many years.
I have a very sensitive sence of taste and smell.
As most of us, I can tell the difference between HFCS and Cane sugar.

I just drank a very fresh can of Pepsi (8 days old). I swear that it was
sweetened with all cane sugar. It was a very "clean" sweet taste, just about
no after taste, the carbonation was amazingly smooth yet sharp. In my mind
this can was not sweetened by HFCS.

Here is the data from the can. Does anyone know if I'm on to something?

Fresh by: Sep 14 09
1051BG121083A
Can code: 81209 DIMF

Anything is possible..

the BG code on the can is that it was produced in Chicago by PepsiAmericas. I would suggest calling their local number and asking.