I didn't get anything about S2W feature on Xperia go forum
Is there any kenel or rom support swip to wake? I'm using CM 11 Build 9 from munjeni, and get the wake up problem. When I hit power button, it took almost 3 to 8 seconds to wake up. I don't know wether the button's problem or the CM's problem.
I tried the slimrom, and the wake up problem is gone!