Danny McG
"Anything can happen in the next half hour!"
Well, from the story opening until the final battle it was about eight years, it wouldn't have worked if they'd all been older at the start.I still hold to the fact that the only way I could make Ender's Game plausible for me was to add about 6 years onto all of the children's ages
A grown man probably wouldn't have fell for the subterfuge.
In the updated edition OSC has a long introduction where he expounds in detail why the kids were that age.
He also gives several instances of people contacting him to tell him kids that age don't talk like that. His response is that they were all the pick of Earth's super smart kids, just what battle school needed