If they took the time to write it on runnersworld.com, they have already thrown away their dream.
Dude I was working 45-50 hours...not in an office either!
Can we say CONSTUCTION...It was tough.
of course running isn't everything. That shouldn't even be an issue. One can really miss a lot in their formative years by believing that it is.
That said, hence the difference between Americans and Kenyans. In Kenya, there is no such thing as a "desk job" or a "shoe store" - to most of the guys that end up kicking the world's ass. So - I think it's fair to say that we will never be on par with the Africans because our lifestyles and the wealth of our country in most circumstances preclude Americans from advancing their lives and status significantly through running - and in many situations, actually have an adverse effect on one's development.
Last fall I was in the same position. However, I found that the key was sticking with a track club (I represented GBTC over the summers in college), which provided me A) practice I had to be at, B) people who were in my same position, and C) a workout schedule. I ran almost just as fast (50.79 400) as I had run in college (50.77 college PR), even dealing with a hamstring injury in the winter. I think that you can certainly continue to improve, but it is more difficult. I find the hardest part being food - there is no all-you-can eat dining hall in my refrigerator.