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Timing in sudoku results?

I was looking at the results of Sudoku round 7 at and was puzzled by the following line:
7. Landen Gelwicks USA Lanrose 320 10 10 00:10:04

Is this saying someone solved 10 puzzles for 320 points in 10 minutes, and then didn't submit any further puzzles? That seems a rather unusual and astonishing thing to do.