Kaylx, I have been reading Thor comics for about..12-13 years at this point. At this point, I like to think I know the character fairly well. I don't think it breaks the character or the portrayal so far..I haven't seen the movie but from the picture..it still looks killer. Just an observation of size is all.
I mean..to me..part of the awesomeness of Thor is the fact that he is a god and he is big and powerful.
I think that is an average portrayal of Thor. I mean..his arms are as thick as Iron Man..not counting the fact that Stark has armor on.