It may have been always this way (and I am sure of this)... What I was wondering about is that it is not specified anyway that DT2 users can also influence the "real" Trust score of a user, by giving a positive / negative / neutral feedback. However, we go again to the above part: if you set the depth to any value, it should not matter when viewing the profile with the ";dt" at the end of its URL... Do I understand this part wrongfully.? Or, rather, did I explain better now what I wanted to say...?
You're overcomplicating this
The purpose of ";dt" is to override any of your personal trust settings and show the ratings how they would look like to a newbie who just registered on the forum (or anyone who doesn't have custom trust settings). Not sure what you mean by "real" score but it sounds like it's the same as ";dt". And as LoyceV said, it is always depth=2 because that's the default setting for new users. That's the "specification" you're looking for.