Cyber Coach -
https://www.facebook.com/CyberCycleCoach/?pnref=lhc
Some you can tell right away, but more likely It will take several years to tell if someone can make it to the elite level (you may need to better define that).
Dave has been a volunteer UC Irvine college coach for 20 years. He will tell you the truth. He has also coached the women's UCI World Champion.