The Snapdragon S4 Pro is an excellent processor (though not as good as the more recent Snapdragon 600 and the upcoming 800), and it should tear through your homescreens with no problems at all, especially since the introduction of Project Butter in stock Jelly Bean (Android 4.1). (gizmodo.com)
It flies already, but Jelly Bean with project butter on top of all that.. (tmonews.com)
It has been confirmed that the GSM, SMS, EDGE, 3G, Signal are full working, as well as Audio, Sensors, Project Butter interface, Full 2D / 3D acceleration, touchscreen, Sd card, Wi - Fi, Browse, live wallpapers. (android.gs)