[She only gets that lead for so long before he catches up to her. She has gotten faster. Considerably faster even.
But she still has some work to do if she wants to ever race Goten for real. Still, it's impressive considering just a few days ago she was just learning. Age up or not. He gives her a thumbs up.]

Hey, you did get a lot faster, Nanako! You learn fast. But you're going to have to do better then that if you wanna beat me!

[He flashes a cheeky grin]