I do remember reading theymos' post somewhere that the new forum was going to be released "next year". That was multiple years ago.
That doesn't necessarily imply a completely revamped trust system.
The new forum software's Github organization has a repository with
the BitcoinTalk trust system (or something very similar) so it doesn't look like there are any plans to change it. If it is genuine, this script appears to tell more about how scores are calculated than any other source I could find.
edit: Here's a rundown of the algorithm, from my understanding of the script linked above:
The variable
s is the trust score, and it starts at 0.
1. For every unique positive trusted feedback, add the age of the feedback in months (up to 10 months each) to
s.
2. Round
s down to the nearest whole number.
3. If
n is positive, subtract 2
n from
s, where
n is the number of unique negative trusted feedbacks.
4. If either
s is negative or
n is 0, skip to step 7 now.
5. Set
s to the number of unique positive trusted feedbacks left since the time of the earliest negative trusted feedback minus the number of unique negative trusted feedbacks left since the time of the earliest negative trusted feedback.
6. If
s is negative, in this scenario the trust score will display as "?
??" instead of a number. If
s is not negative, keep going.
7. If
s has 5 or more digits, then cap it out at either 9999 or -9999, depending on if it is positive or negative.
The trust scores are displayed as
s: -n / +p, where
p is the number of unique positive trusted feedbacks. If
s is negative, then it is "red trust" and the "trade with extreme caution" tag appears. If
s shows as ??
? then it is "yellow trust". If
s is at least 5, then it is "light green trust". If
s is at least 15, then it is "dark green trust". If
n is not zero, it will be bold, italic, and yellow, so that it is more visible.
I ran through the steps for a bunch of people in this thread and it all adds up right so far.