Question about Calibration results

I'd suggest you research display gamma. The gamma will define (and change) the way the data trends from black to white while not changing black or white. If you want your black to stay where its at, yet get more details just above black, you'll need to change your gamma curve or transfer function. I'll also note this is a balance act. You only have a fixed number of pegs and holes. If you want to stretch something in one place, you'll have to squish something somewhere else. No free lunch but you may find a different balance that you prefer over what you have now.

Dave

Dave's suggestion is spot on. Many folks hope that a calibration will somehow magically re-engineer the display and eliminate core technology issues.
I am not in the least suggesting, MASKOAA, that is what you are intimating. However, your question is thematic for calibrators, in that, when Blacks are raised to reveal the Detail we all wish to see, that evil Dithering or Quantization noise rears its ugly head. This is a signal processing issue that calibration can't overcome in the current crop of sets. When Bit processing rates become higher, and there are, as Dave refers to, more holes for more pegs, you'll see more Detail near the point where to where Black finally crushes. Hopefully, one day not too far in the future, we'll get Digital displays that can fully emulate that old work horse, the CRT.

First set up contrast and brightness per Poynton's Gamma FAQ and read his other gamma articles if interested. They are available at his web site. [http://www.poynton.com/].