I'm still convinced that the only reason Ginn was picked that high was... Devin Hester.
In many ways you are correct. The biggest revolution in the game in the last 15 years has been special teams play. Kickers who can make it from 60 yards, and guys who can return kicks and punts for touchdowns on a moment's notice.
Donte Hall, Brian Mitchell, Devin Hester. Now how would that lead you to draft a reciever like that so high?
The following basic logic. Player is a good kick returner> Player must have really good speed + better than average open field ability.
The problem was, Ted Ginn couldn't catch a hooker in a whore house. Do you keep a guy like that simply to return kicks?