Hi Gianni,
Yes, once you select the correct Video, then the Bitrate and Resolution should appear in yellow in the upper left hand quadrant of your screen, just as the image below shows
You will see the Bitrate and Res change as the connection 'Ramps Up' to establish what the Netflix server considers to be the optimum connection. Likewise, you may also see this vary if you try it at peak viewing times (6pm to 11pm).
The main thing is to select the correct Video... when you search for "Example Short 23.976", it will return several videos with similar titles (the "Reviews" are worth reading for a laugh)... some of them will have Roman Numerals after the above title (e.g. I, II, IV etc.) ... just make sure that you select the EXACT video with the above title above, with nothing after the text.
If you like, you can always try Netflix on your computer browser, just to see how the video should behave and then try it on your ATV.
Hope that helps.
Cheers
Ronnie