Hmm... excellent topic, actually, and me knowing your instructors, I'll have to admit it makes me a little curious.
I have experienced this description many times myself, and I'm not sure thar natural talent or natural ability is really the best description. I think there is a certain natural aptitude that some people posess, though.
As an instructor, I can tell you that some people do seem to "get it" a lot quicker than others. This doesn't mean tha through hard work people without this natural aptitudecan't become outstanding martial artists, nor does mean that those with it will automatically become good martial artists.
Remember that martial arts is only partially physical in nature. I'm not sure why it is, but often in my experience, those"naturally gifted" students often tend to neglect the mental side. Sometimes they even neglect the physical, as they know they can put out less effort than other students and still look as good, not understanding that the martial arts requires everyone to continually push themselves, no matter how talented, in order to really get anything out of it.
If anything, I'd say in many cases those with the natural talent you speak of are actually pushed harder, as they tend to be some of the first to slack off at advanced levels.
So, simply because this natural aptitude exists, doesn't mean that trainng is really any easier for one who posesses it. We all have to push ourselves to our own limits, rather than judge ourselves in comparison to others.
As for the bosy type issues you brought up, it does have some validity to it, but becomes more an more negligible as one continues to train.
One who posessesa mesomorphic (shorter, muscular, etc..) type does tend to look better perfprming certain techniques early on, but this is more because other body types have specific diffculties dealing with either overall balance (ectomorphic- tall-skinny types), or flexibility (endomorphic- overweight types) that mesomorphs don't tend to encounter.
Quick story:
I trained with Mr. A.W. my whole life. His body type was very mesomorphic while I have always been more ectomorphic. Early on, he would always look better in anything he tried, forms sparring, whatever. he had the 'natural talent' while I did not. I had to struggle with issues of balance and coordination that he simply did not have. He did have other challenges however, outside of he scope of this discussion.
As we continued to train, though, the gap between us narrowed is now gone altogether. I learned where my strengths and weaknesses are, as did he. When we spar, we may go for twenty minutes up toan hour without either of us ever landing a good hit. When we do forms, we each have our own quality we bring to them, diffrent yet also the same. Now we both simply try to learn what we can from one another.
So aain, while there is some validity to the body typequestion, it does become less apparent over time.
Sorry, this got kind of long-winded and I'm not sure I answered your question. If you ever have anything you wantto ask more privately, since I am familiar with your training environment, feel free to PM me.
Generally though, if someonetells youyou have natural talent, take it as aboth a compliment and a warning that they'll have their eyes on you, and you'll have to train even harder.
It is both a blessing and a curse, as are many things in life. Know your strengths, but know your weaknesses better.