95% of D1 runners suck. "Former D1 runner" implies that they are part of the other 5% when they are not. By saying that they are not part of the 95% of D1 or D2, D3, NAIA or JUCO is an attempt at unearned gravitas. If you were the real deal you would simply say "I was a college runner". Thats it. No need to create a class hierarchy that doesn't exist.
For years the brojos used to label nationals not D1, "the Baby Nationals" which was extremely offensive, especially considering that they themselves competed in the "Baby Conference" and were nowhere near the top 80% of NCAA D1. I used to make that point for decades until the message finally sunk in about 5 years ago when they stopped with the baby nationals shtick.
We don't have a class hierarchy in college athletics like social casts in India or other cultures. We don't need to wear a red bindi on our foreheads to show our status. We are all just runners.
Quit saying you are "D1". You are a former college runner, or just a "runner". Why isn't that good enough?
"D1 runner", although true, is really not much better than claiming false times or coaching credentials at a University in San Antonio.
Truth be told, if you were DFL in NCAA D1 XC you were actually better than 99% of all D1 runners. Think about that.