Hi and welcome Luciente,
I agree with you that workikng a year or two above age peers in reading or doing math is not a big deal.
However, at least in my case, the gap keeps getting larger as my dd grows older. She is currently working on 6th grade math (she just turned 8 last month). She learns at a faster rate and unless her curriculum is individualized she would have to be constantly waiting for the rest of the class to finish.
She didn't start school until she was 6 1/2, so she has finished the math curriculum for grades 1-6 in 2 years. She is not "hothoused" or "pushed" She is simply able to grasp concepts quickly. I don't really care for bragging rights, I was just concerned that she would learn to just cruise thru school without any effort needed. I simply support the idea of teaching children "what they are ready to learn when they are ready to learn it" regardless of age. This is actually her school's philosophy.