A student approaches lessons and practice in a way that either fosters its success, or not. There are no shortcuts. You cannot simply compare a student who practices five minutes a day with another who practices an hour a day. The student who practices five minutes a day does not gain ability in the long run; a student who practices an hour a day, in a conscientious way, develops superior skill without fail.
"People either become experts at doing the right thing, which is seen as a fine talent, or they become experts at doing something that is wrong and unacceptable, which is seen as lack of talent. Depending upon these two things — the amount and quality of the practice — superior ability can be produced in anyone. " —Suzuki
For more information, learn more about the Suzuki Method in the book, "Nurtured By Love."