He's been playing since the beginning of BBCP, but he wasn't that good at first. He did stick to Bullet, however, and it seems like his dedication's paid off.
AFAIK, none of the Bullets got qualified yet, but I'm honestly not following it that well.
Yeah, that's all good points, and it's too bad that the mook doesn't give any additional info here. I can only speculate that traveling across the screen takes the same amount of time, independent of the distance (like, she gets faster if she's farther away). Moreover, the mook doesn't mention the max length of the D charge, which is damn weird for chargeable moves.