While I certainly admire the programs at CU and BYU, there are differences between them AND between CSU.
I don't know much about the women's side of these programs as compared to the men - so I'll only comment on the men.
First, Colorado State is a BETTER Track & Field program than CU. Assuming they are both fully funded CU has chosen to emphasize distance more so than a well-rounded track & field program; and CSU appears to be going the route of a well-rounded program. So it is no surprise that CU is better in distance and CSU is better in Track & Field.
Second, while CUs distance certainly is historically stronger, CSUs distance program is not to be taken lightly. I believe CSU finished in the top 10 at XC that past two years. With probably over 300 Division I program, being in the top 10% (31 teams) means that on that year, you had a really good team - and the fact that CSU has finished in the top 10 of the 31 teams, is a testament they are legit.
Third, neither CU or CSU can easily be compared to BYU. In fact, not many, if any at all, can. BYU has built-in advantages (and no, I'm not implying the missionary-age thing) with recruiting and a super low cost of tuition/fees. Just about every HS student that is a member of The Church of Jesus Christ of Latter-Day Saints wants to go to BYU - especially so if they are looking to compete collegiatly in athletics.
With BYUs recruiting advantage coupled with how inexpensive it is to go there (I think around 5-6K A YEAR for tuition/fees!!) it is INCREDIBLY easy to hoard kids on the roster and develop them. Some have suggested that for their men their 8-14 runners could beat most schools' top 7. This is to be expected and not surprising at all given their advantages. BYU SHOULD be thinking podium EVERY YEAR, and if they don't, they have underachieved.
Where perhaps they fall short as a program is in track & field on a national level. Like XC they hoard athletes in all event areas so they can clean up in conference-type meets, but they don't consistently have the higher quality track & field athletes in non-distance event areas who can score on the national stage. This could be more a function that HS kids who are members of the Church participate in - distance running vs. any number of other events.
So, comparing BYU to CU, CSU or nearly any other school, is very difficult. No other school I can think of has the recruiting and tuition/fee advantages that BYU does, particularly for distance runners.