absolutley 100% untrue.
go ask any attorney in ohio and they will tell you that if you are convicted of ANY drug offense, regardless of if it was possession of pot or cocaine trafficking, regardless of whether it happened in a car or not, and state law says you lose your license for no less than 6 months, and up to (i think) 5 years maximum.
if you are walking down the street, smoking a single joint, and a cop stops you, you can lose your license, if you are convicted of the drug offense.
now this isnt to say that an attorney cant get you your license back maybe, or if you dont get actually convicted of the crime, then you wont lose your license. IE if they plea bargin down from "drug abuse" to distrubing the peace or something...