How talented to be considered talented?

Ok so I used to be the rebellious kid from the age of 7. I started playing piano being forced to, and quit when I was around 10. I took lessons which were never serious, played around with the watered down version of fur elise and symphony no 5 from beethoven (at least what I can recall) I loathed the piano and once my parents couldn't force me anymore to practice, I finally quited.

Only around last year May when I restarted piano after having found some nice pop piano songs. Then slowly my interest grew (or rather exploded vigorously), I started moving into anime piano solos, game music and finally classical. (chopin actually brought me in), in a short time of one year I became a classical convert. Now my entire playlist is classical music

Along with my abrupt interest, I started invested about 1 hour of daily time to the piano, found a teacher and initially agreed to take grade 4 examination this year. (because I actually had some background and I started knowing the really fundamentals of music). Initially, that was the plan but my progress was faster than expected. Right now I am preparing for grade 6 and the pieces are comfortable. My teacher and other musicians around me would safely evaluate me as grade 7 at worst and 8+ at best.

So that was what happened in one year. Of course late 2007 I broke up with my girl and piano was my main source to keep myself busy. I started playing around 2 hours everyday slowly moving up to 4-5 hours of practice right now (and around 6 for weekends when school examinations are not near). [probably that explains how I improve so fast]. It feels like I am riding the peak of the learning curve.

I know what I am about to say next is very inflammable. I am currently studying chopin etudes with my teacher. I'm playing 10-1 with guidance (though I was told not to expect much and play it not even close to any recordings), 10-3 10-4,10-12,25-6 by myself. (though some are really just purely for technique). [note:i do not wish to turn this into an etude thread]. I will not be able to play anything up to concert level but I think playing decently should be fine.

I was thinking of taking ATCL's diploma one year from now. My progress has been steep and I could actually imagine half the repertoire in ATCL to be learn-able if I put in the effort.

My parents, teachers and friends (whom are piano students too), are all rather surprised with my progress. I was told from young that I was talented (but no one ever said it's extent). Sometimes when I look back where I was 1 year ago, I feel extremely astonished, the me who was struggling in playing pop music (and reading notes) now attempting etudes.

Of course I did put in the effort (in fact a lot right now).

How much can I expect from myself? I find myself satisfied with immense progress yet also greedy in way and craving for more, to get better and better. Music (specifically) the piano has been a big thing in my life right now.