I'm new here too and I'm waiting to pay off a brand new CZ 75B from Bud's.
I do remember reading somewhere (I THINK on this forum) that if you simply try to release the slide and hold it as it goes forward, the rnd may not chamber. This is not the intended action/ speed of the slide in real fire so I think that may not be a real issue.
You said that you went to the range and fired the gun? I am guessing there were no failures to go into battery which would be my concern if I noticed the same thing without knowing much yet about the CZ platform.
As far as the slide release being so touchy; yes. that may be an issue and from what I know about CZ, (I do own a CZ 452 Military Training rifle that I sent back for a burr on the sear) they are top notch in fast and effective service. Plus, I actually got to speak with the CZ gunsmith during my repair! and I picked his brain on the CZ pistols too knowing I was going to buy one!
In the end, I trust you will be 100% satisfied..
and CONGRATS on your new CZ!