Alex Kirilloff missed an entire season as well, ,came back just fine... He hadn't played any full-season baseball yet either. When they're that young, it's obviously all about the talent tools and upside, but Javier's tools are incredible.
I would also say that I think that the difference between 4 and maybe 14 is all a matter of opinion.
Seth, didn't Javier injure and have surgery on his non-throwing shoulder if I remember correctly?
Also, have you heard any news about how his rehab is progressing or if he has even started it yet?