looking at my two kids and how different they are while I'm pretty sure they are gifted, I honestly believe that unless there's an LD involved, the age at which these children learn to read depends largely on their INTEREST. My older one is clearly a math / sciency kinda guy while my younger one was fascinated by letters before he could talk. While the 2.5 year old is learning to read, the 4 year old has very little interest. Yet I am pretty sure if he wanted to, he'd be easily capable of it. But it's the last thing on his radar.
as for the original topic, I don't have much experience with testing just yet, but I wouldn't go by the numbers unless they are made official. If the test is still being worked on, I would go with whatever other test results I have ... and with my own gut feeling of where I see my child fit on the scale.
