Results wise diamond is the best player in abd, anyone that says otherwise with no statistics is pure speculation and couldn't be considered seriously.
It is highly unlikely a player that considers himself top-1 is not going to take a shot at dueling and if they haven't they would still need to take a considerable amount of time to adapt to the styles and cheeses of the mod and which mostly comes from experience. A big part of dueling is playing based on your opponents tendencies which is rare to incorporate at a high level if you are just playing a wide range of players in a non-competitive environment.
This basically just narrows down their thought process to what the average player does, or in some cases they are just playing vs opponents that can't identify a strategy that works against a broad range of non thinking players. Then there is little to no reason to even think about what your opponent is doing.
-molotov5 aka shjz aka bigdickmcgee aka shitjizz aka rockefeller(unban pls)