cookeag - you're welcome

but, please note that I didn't call enlisted Marines dumb, just uneducated. And by the way, my assessment of enlisted Army soldiers wouldn't be any different.
It's not until they reach E4 going on E5 that they start to really learn about the world around them, seeing the big picture, etc. In my earlier post, I had intended to write about a HS buddy but forgot to. Anyway, Ulysses90 could probably provide more detail on senior enlisted development but at that point, you're transitioning into a career.
Anyway, I took the OPs question to be more like - let's say I had a HS kid who was looking at 4 years enlisted in the USMC or 4 years in the Corps of Cadets at Texas A&M, which one would you recommend.
Assuming the dollars were equal, I think 4 years at A&M would be the way to go. However as Ulysses90 stated, hindsight being 20/20, 4 years enlisted is not a bad way to go assuming you are going to college to get your education afterwards - paid for with your GI Bill.
One of my former soldiers went to t.u. after his 4 years enlistment. He was a great student and had no problem pulling chicks as an Elementary Education major (smart move, right?). With the GI Bill, he had is school covered so he was in a good position. As Ulyssess90 stated, it's the debt situation that is going to crush kids coming out of HS today. They're probably going to be paying loans off until they're in their 30s.
Back to the career education for just a second. A HS friend enlisted in the USMC and made a career out of it. He just retired last year after 24 years in. It wasn't until he worked his way into the senior NCO ranks that he really started getting the education that will help him for the rest of his life.
I also wanted to add that my 15 y/o daughter and I were vacationing in Goa, India last October and we wound up visiting with about 10 or so enlisted Marines who were drinking Kingfisher beer at the swim up bar in the pool. Great group of guys and it was interesting talking to them about what their aspirations were. Some planned to stay in. Some planned to go to college. The kid with USMC tattooed across his stomach in letters 8 inches high planned to go back home to Lake Arrowhead, California and join the Fire Department (I was crushed though when he told me that I was the same age as his mom - I felt pretty old then). The kid from Arkansas took a liking to me because I was from the South - all his buddies made fun of him for sounding like a redneck. And much to my surprise (and theirs), one of the Marines had a father who was from Saudi Arabia. So when I mentioned that I grew up in Saudi Arabia, they all understood it (that's never happened before). Because, this Marine had already been through the explanation of the oil business with his buddies.
So not dumb. But, just don't rely on a 4 year enlistment as your only source of education.
So, back to the OP, I'd ask your HS student what his career aspirations are following his service in the USMC?