Actually, those of us who compete for highest score are doing mostly 5x5 puzzles. I do probably 95% 5x5 puzzles and I try to do only 5x5 puzzles. Anyone who averages a score in the high 400 and low 500 ranges is doing mostly 5x5 puzzles. I also average around 130 seconds on 4x4 puzzles because I do so few of them, much higher than my overall average times. And lastly, how am I abnormal.