You may be right Sir as his scale was always kind of whatever the camera needed it to be.
There's certain scenes where he's massive and then there's scenes where he seems in scale to the camera and the characters.
I would ask you to also see the flip side of the coin in watching the scenes in which he and Thor fight against each other and together.
The kind gentleman below you posted this picture right after yours:
Now lets look at the movie scene again you posted:
I did my best job to recreate the height difference in that pic by spreading out the Hulks legs and bending him forward here:
Now if you notice I practically have him doing the splits in this pic, and bent fully forward as represented as the "hunched over" argument. Even then it's close but still noticeable.
I also stood them up straight and Thor barely comes up to Hulk's upper abdomen. Thats a good 6 inches.
I also took this screen cap of the Hulk Thor fight where you see the best interpretation of Thor standing on his feet upright and Hulk about the same here:
That's a drastic contrast to this:
In closing, it's the best Hulk toy ever made, bar none. I've been nerdgasming on him for almost a week now! And it seems like Marvel stated he was a certain height to HT while never truly portraying him consistently at that height through-ought the movie.
I'm interested to see what they plan to do with him in the sequel and if they do the same thing or integrate him more within the team for more shots.
Until then, keep posting more pics of Hulk!!!!!!