<brag on>
Yup. I have a 14-year-old son and a 12-year-old daughter. Just got back from an 85 miles ride with my son, who gets A's and B's in school. My daughter competes in Irish dance competitions that would have most people gasping for breath inside of three minutes, and has a 98% average in middle school while taking several high-school level courses.
<brag off>

And yet I hear people complaining when they spend a couple of hours inside playing on the computer; "They should get summer jobs!"

Yep, right. They could deliver papers. Oh, wait, nobody hires kids for that anymore. Heck, newspapers barely exist, for that matter.
They could mow lawns and weed gardens! Except for the fact that everyone has lawn care services or does it themselves--and those who don't fall into that category won't hire kids because they're "afraid they might hurt themselves."
They could work on one of the local farms: Nope, same problem as above.
"I worked as a stockboy at the grocery store when I was 14!" So did I. Nobody hires kids at stores until they're at *least* 16 now.
etc, etc, etc.

Their friends are in the same position; doing great in school ( and studying subjects in middle school that we didn't get to until we were at least Juniors in high school ), participating in any number of activities that aren't immediately visible to anyone who doesn't know them, and they'd love to get jobs, but nobody will hire them because the adults are afraid.

So really, people can rant about "kids these days" all they want--it just goes to show that they very likely don't know what kids are actually doing, or assume that because they don't see them playing baseball at the corner lot that the kids must be slugs who spend all day stuffing their faces with Cheetos, when the reality is that a lot of "kids these days" are easily surpassing what the complainers did--both physically and intellectually--at the same age.