The post has nothing to do with the memory thread you posted it in so I moved it to the forum. The thread you posted it in was about manually setting some of the DRAM signal parameters to facilitate DRAM overclocking without changing voltages - which has nothing to do with the question you pose. I want to keep the thread on topic. Thanks.
As for your random question, the Wizard percentages are based on frequency increase over stock. If your kit's XMP is rated at X frequency higher than the default frequency, then it will increase by the amount shown when XMP is applied. That's all it is.