I almost completely disagree. I've mentored guys who were greener than grass who grasped things like input sanitation intuitively. I've also worked with guys w

I almost completely disagree. I've mentored guys who were greener than grass who grasped things like input sanitation intuitively. I've also worked with guys with 5+ years experience who thought this: $foo = $_GET['foo'] Was input sanitation. I would posit that, because of the vastly different quality needs, understandings, and valuations inherent in the industries that our industry touches (namely, all of them), it's unlikely that you're going to see any strong correlation between age/experience and code quality.