No, he's saying they will move lines due to injuries and other factors, I am saying that only money moves the line. Vegas does NOT want disproportional play, which means they will not move lines unless the money dictates. Vegas wants to guarantee they make money, and by keeping the line to where they are balanced will make EVERY game profitable, by squeezing the juice.
Reading material
http://www.ultimatecapper.com/sports-betting-articles-17.htm
Omg, your own link mentions that injuries can move the line.
Here is another one:
http://pregame.com/EN/main/sports-betting-basics/gambling-rules-advice/12878.html
Once betting begins, sportsbooks can adjust the line at any time. In doing so they attempt to make more attractive the team that is getting less action. By moving the line, sportsbooks can influence how the public bets on a particular game.
For example, if the pointspread on a game is 7 and most of the money is coming in on the underdog (taking the +7), sportsbooks will then move the number down to 6 ½ to try and attract money on the favorite.
Moving the line is the oddsmaker's effort to balance betting action, and often times such moves can have a major impact on a bettor's decision.
Oddsmakers can also change the line depending on various event-related factors such as player injuries or weather. Obviously, if the line comes out a week ahead of the event (which is the case in football), there is much that could happen during the week leading up to the event that could affect the line. Oddsmakers have to determine if any changes are necessary and send out an "adjusted line."
"The main objective is that our clients get equal action on both sides," Seba said. "We're not trying to pick the team that covers the spread, we're trying to make it a coin flip, a tough decision (for the bettor). If we've done that, we've done our job."