That write-up certainly doesn't go "in-depth" -- it's 621 words, comes from a single, anonymous source, and contains as much editorializing as it does content. Calling it an "article" is a bit of a misnomer.
That said, this doesn't really tell us anything we didn't already know -- it was reported ages ago that Favreau had contentious negotiations for his Iron Man 2
contract, we knew that production was frenzied because the release date was locked in before any work had begun on the film. The only nuggets of new information here are that Downey didn't care for the movie, and Favreau may not have been happy with having to insert so much Fury / Avengers material, but I didn't have a problem at all with that stuff. As The Avengers
gets closer, the Marvel films are going to have more and more material to set it up -- hence Clark Gregg having such a prominent role in Thor