Reading your comment I had to try this out, now down to the hardware it's proven that iDevices beat out Androids by quite a bit with regards to responsiveness, although I can't find the article describing it, but safe to say I know there's a difference.
However, I own a Samsung Galaxy S1 (that's 2010 era, people) running CyanogenMod 10.1.3 (that's 4.2.2) and my responsiveness is... just fine! Pulling down the slider I get the very slight initial lag (simply because my phone is crazy slow), and the slider itself does lag behind but that seems like it's by design.
Next I am on my homescreen; ADW Launcher, and I'm running running some taxing animations with 1x Animation Scale. There is no input lag. I can get the initial lag and again that is just my phone being a wreck by today's standards, but going back and forth the animation is as responsive as could be.
Based solely on my anecdotal evidence, I call BS.