Some very talented individuals can get there much faster, untalented much longer - just like with everything else, there's some distribution involved, and the mean might be somewhere around 10k. You'll still have the tails on both ends...
I'm a musician, and I've seen people get "good" really fast. They've learned 80% of the instrument in as little as 2-3 years, and you couldn't really distinguish them from someone that's been playing for 10 years - prodigies like that pop up from time to time.
But I've neve met a prodigy that just half-assed and got there in that time. Every single one that I've met, have been practicing obsessively during those formative years. At my peak, I could play guitar for 8 hours a day - and every good musician I've ever talked with, have the same stories of playing/practicing long hours for some time.
I like to think that if you're talented, you can turbocharge that time. You don't need to spend as much time as others on certain things, and can progress much faster. A good friend of mine has perfect pitch, and learned every note on the instrument in just a couple of days. On the other hand, I've met people that have played for years, that struggle to find almost any note - just to use one example.
With that said, it is the last 10%-20% that takes time to master. That's where all the nuances come in, and what differentiates a master from a good musician.