Really if you own anything with any part made in china there is a chance child labor was involved... Heck most anything has a chance of child labor allowed.
Reality is in some places it is better for the kid to work, because they want to be able to help their family survive... it is a really sticky moral issue. But in America we are to be appalled by it. So of course apple would change suppliers... but really only eleven kids? I mean doesn't that show that it was extremely limited...