USPC - Final post
Statistics aren't up at the moment I am writing (they may be soon) but a quick search of recent USPC's shows the least completed puzzles on USPCs I took (2004+) was the atomic fusion at ~1.8% in 2006 with the Numerical Jigsaw (2005) at 2.5% just behind. Including the one "Google" USPC I did not take (2003) shows that the absolute low was indeed in 2003 with the Rotator Mosaic at .5% and Spellbound IV (.9%) and Dutch Week (1.2%) also amazingly low that same year.
Given "puzzle selection" possibilities in this age where a lot of sudoku-like puzzles will feel familiar, I wonder if Dot Triangles will set a new low?
Edit: Dot Triangles came in at 2.9% so Atomic Fusion still holds the win in USPC's I've competed in.