I know that Rivals pretty regularly runs "How Did We Do?" type articles that show both accurate picks and busts where they whiffed. Not scientific, but at least owning the speculative aspect of what they do.
Because he hasn't camped as much, Teague is an unknown to the sites, outside of his tape. After camping at both Bama and here and his gaudy numbers, his ranking will shoot up. If you remember last year, Rivals was late to the party on Trey Smith (whom we made it down to the wire with) due to lack of exposure, while ESPN had him at #1 for a while. In the end, they were both wrong to a certain degree.
As for those watching Teague's rankings, it's a lot of ground to make up for those who want him to be a 5*, so don't be surprised if he ends up just outside of some top 100s, but with a lot of "insider" guys like Wiltfong saying "watch out". His ascendance will probably be dictated largely on how many camps he attends and if he ends up in any all-star games.