Kitty was familiar enough with more than a couple individuals who weren't born with the abilities that they had. Reed Richards and the Fantastic Four came to mind almost immediately, actually. So, that wasn't something Kitty had any trouble believing. "Probably somewhere sort of like homo-superior, another less preferred name for mutants." Kitty admitted, just going by guess with that. The nods came automatically, considering she knew certain other actions could enhance or chance the make up of a person in different ways.
"So you developed speed by circumstance." Kitty nodded in understanding before giving a bit of an appreciative whistle. "If your speed is anything like a mutation then it probably grows over time and with practice. When I first developed my mutation I could only phase myself, now I can phase a group of people with me, when I need to." Kitty explained.