It's not hard to get that high a score no matter what aiming you're using though. Getting 50 hits with gyro isn't exactly an accomplishment over manual.
This is the pad/stick debate all over again, and even in those debates, it comes down to preferences.
"I'm really good at aiming with the circle pad" doesn't negate the objective truth that the gyro is more accurate unless you're in a moving car or have a tremor or something.