Keep in mind in some cases (certainly not all) retailers are sourcing out their merchandise up to 12 months in advance. It's not unusual for large retailers to already be buying next years holiday items at negotiated bulk rates. This simply means a little patience is needed as some stores did pay a higher exchange rate months ago for the product that is in their stores now.
My thinking is that this will even out in about 4 to 6 months and then we will be seeing much more of the savings based on today's dollar.