[jegea]

In my experience (I'm 51 myself), the older the guy, the most likely he's aware he doesn't know everything

[AnIdiotOnTheNet]

And also the more likely they have wisdom that is far more valuable than whatever the flavor-of-the-month tech skill is anyway.

[newen]

This is ignoring the stereotype of the recent college grad or someone with just a couple of years experience who thinks they know everything. I see everywhere at my work. When you take into account that 90% of software developers of all ages are just not that good at their jobs, things start to make a lot of sense.