I did some searching last night to see if I could find if that photo was real. I'm betting that was taken in Canada, they have wolf hunts and the wolves are apparently big. I think I saw that the record was 230 pounds, blowing away the old record of 175 pounds. A few things I read about, when you are behind the critter being photographed, it makes the critter look bigger. I also read that canines look bigger when you hold them like that. Here is a site I found that shows one that looks almost as big, but the one posted here still looks huge (or the person behind it is small).
http://www.huntandtell.com/tag/wolf/
http://www.huntandtell.com/tag/wolf/