Mirc
Not mIRC!!!
Fully developed is one thing, but they would lack any life experience. IE they will be bigger and stronger, but not smarter. They wouldn't even be able to speak any language and would likely not even know how to walk properly.
It would basically be a baby in the body of an adult.
Oh and... if they became adults faster, they'd likely die faster too.

Oh and... if they became adults faster, they'd likely die faster too.
