Generally crap player here who did better than Cicero twice and lost once.

I don't know what they would say but it looked to me like the matches in which they entered Cicero had a pretty wide range of skill, although I don't think there was anyone who diplomacy players consider to be at the top of the game. Hard to say as online diplomacy is so fragmented; Cicero was in a very new very niche variant.

Edited to add that I forgot about some of the players who were involved in the playtesting and design side. They're pretty good.