As I said before, at this early stage it's very likely people who are experiencing issues are likely to be the most vocal. I've spent the whole afternoon quite comfortably creating music with Push and zoning out. What have you been up to? oh that's right.. scouring the forums for more evidence to justify your job.
*edit* Just did a quick google search on problems with pad sensitivity and it seems Maschine suffered from the same problems on some user's units. I can't be bothered to copy and paste all the links right now as I have better things to do. Others can do the same search. I'm pretty sure ALL hardware output from a factory will have a % of bum units so making this all about Push is pretty biased.
anyway here's a funny image for you.

Carry On