[Dev. Question] Xperia S sensitive buttons in Stock and best in MIUI?

Nov 1, 2012
Already much has been said about the problems with the Xperia S in terms of the sensitivity of the 3 buttons on the bottom because it does not respond well to the touch...

But two days ago install a MIUI rom on my Xperia S and was surprised to see that 3 buttons worked perfectly and had no failures respond always to first touch ...

My question is: Where or in that file or configurations are those 3 buttons? and if they can be used in creating the roms based on Stock-Sony...

Thanks for read...and Sorry for my bad English