How can you tell? Is there a way of viewing people's trust lists?
add a user to your trust list and you'll be able to see it clear as day. you'll have to exclude DT and remove other users.
Can you give more details? Where do I see it? I've added users to my trust list before and not noticed their trust list appear anywhere.
https://bitcointalk.org/index.php?action=trust
tried to use that with your name (exluded DT) and found that you have trusted 23 users and excluded QS. if that's wrong then I must be wrong.
Now this reminds me of the movie Interstellar... 
just stay in the background, man.