I am pretty sure it was Peter a friend of Sterlings. Did you by chance ask him if Peter wrote it or if he could check with Peter? Peter posts on Sterlings board. Peter was at the race.
If you notice the poster signed their name as Peter.
Hey if you find out let me know who.
I think it is Peter on Sterlings board.
Here is his alias. I am not sure but that was my best guess. Peter was at the race in Chicago I am almost sure. I took that as another very positive sign!!!