Hey David,  thanks for checking up on this for me.  I've been speaking with Dell folks all day trying to find this info out.  I've got someone getting back to me later today and they think the same as your answer but they wanted to double check for me.  I'll let you know what ...

I'm thinking of getting the Xps 13 but I checked out the specs from the United States dell site and the Australian and noticed a difference between the two basic models.  The Australian version uses the 4GB Single Channel DDR3 1333MHz Memory and the United States version uses 4GB Dual Channe...