Recently a few of the top guys have started doing their easy runs too fast. The coach has said beforehand it's ok to go up to ABC pace based on race times, but not any faster. Coach has mentioned a few times before that there are days where you need to recover and go slower than that pace (keep in mind that pace is based on flat terrain and perfect conditions). The top guys have taken that statement as "run ABC pace every day". None of them have peaked well (it started in cross and continued to indoor and still happens now) since they started and I'm afraid if they continue down that path it's going to be very frustrating for them when they can't races well, get hurt, or even burn out. Especially because they believe that running as fast as they are (or faster) easy days will make them faster.
Also note, they always say they feel fine (even the day after a hard workout). The rest of the team is always sore and we all take it easier than normal.
I've tried showing them past examples of guys who were faster and did easy runs slower, I've showed them logs of pros who run slower than they do, and I've tried to describe to them, physiologically, why they need to slow down. They won't accept any of that.
Coaches, athletes, anyone, how do I get the message across?
tl;dr: teammates are running too fast on easy days, don't know/believe it, and their running in the championship season has been affected, how do I convince them to slow down?