"The fact I can pick up any Dual Shock or Xbox 360 controller and it feel just like every other one is pretty mind blowing." I totally agree with the gist of y

"The fact I can pick up any Dual Shock or Xbox 360 controller and it feel just like every other one is pretty mind blowing." I totally agree with the gist of your statement but as someone who has an absurd amount of Xbox 360 controllers I'm positive that they changed the components at least twice in the standard controllers (not including the obvious redesign of the gray special D-pad controller or all the various special editions) in ways (weight distribution, outer materials) that you can totally feel without taking the controller apart. I haven't researched this to know if this was due to changes over time or different factories or what but of the 9 or 10 controllers I had over the years (used on both the actual Xbox 360 and a PC) there were 3 distinct different types of feel that were subtle but obvious if A/B testing.