If you've been following our SoC related coverage, you'll probably have come across our coverage of Qualcomm's upcoming SoCs in their Mobile Development Platforms (MDPs). It's an interesting way to get both a feeling for the performance of a given platform before things are final, and to see how much OEMs affect the final performance.
http://www.anandtech.com/show/6112/qualcomms-quadcore-snapdragon-s4-apq8064adreno-320-performance-preview