Latency is a noun referring to something inactive, dormant, or lying in wait. It’s the state of not being visibly active yet — like when you're hiding out and waiting to jump up and yell "Surprise!"
Perhaps a little late, perhaps right on time, latency will wake up from its nap eventually. For a characteristic or skill to be in a period of latency, it does have to exist. So you should only use latency to describe your pitching ability if there is a fastball in you somewhere – otherwise, just admit you can’t pitch. If you’re in the lab, latency is also used to describe the period between a stimulus and a response.