So, where does that leave you? According to economist David Galenson's book, Old Masters and Young Geniuses: The Two Life Cycles of Artistic Creativity, there's not really an exact age at which someone hits their creative peak. Instead, it's how you engage with creativity that can influence when you do your best work.
For those artists exhibiting "aesthetically motivated experimentation," such as Cezanne, the goal is to keep creating until perfection is achieved. Thus, success comes later in life. For a prodigy like Picasso who is inspired by "conceptual execution," however, conceiving and expressing an idea happens sooner rather than later, at which point they move on.
Interesting stuff, no? Just wait 'til Mom and Dad hear how you're not lazy and wasting your potential; you're simply "an aesthetically motivated experimenter"! (Fast Company)