Hi Stu,
The document is a single sheet of A4 titled Premium Color (yes they spell it Wrong!), UP2716D Color Calibration Factory Report.
There are graphs and charts showing details of sRGB and Adobe calibration. Grey-Scale Tracking and Gamma. Along with tables showing brightness and colour uniformity across the screen.
To be honest, I don't know how a good or bad monitor would appear on these graphs and charts, so I have to trust Dell that it is up to spec. Despite my lack of knowledge I am happy that the monitor is a good one, it is better in every aspect than the older HP monitor.
As for seeing a shift when you switch between adobe and sRGB, I believe that is normal, SRGB has fewer colours in its gamut than Adobe's colour space. I've not yet tried the X-Rite calibrator yet, I'll get around to it eventually.
The one concern regarding calibration is that our eyes get used to an incorrect white balance and then we can think that a correctly calibrated monitor can look wrong.
Colour calibration, a complex subject, but I think I am now looking at accurate colours on the Dell.
Chris