Well on the electro crap it being used is cool cuz it is an element of that genre....... but on the other songs that range from pop to R&B to ballads.... there better not be any trace of autotune.
ALL singers use PRO TOOLS for recording. Pro tools helps correct and perfect the vocal, take out any roughness or rawness. Autotune & vocoder changes your voice and ANYONE can use it to make them sound like they can actually sing. Its like false advertising.

Thats the difference. Also like the saying goes, if everybody jumped off a cliff.... would you?