I thought it was general knowledge.
Here's a recent article about the history of apple v google maps.
http://online.wsj.com/article_email...98502695522974-lMyQjAxMTAyMDAwNDEwNDQyWj.html
"Apple executives also wanted to include Google's turn-by-turn-navigation service in the iPhone—a feature popular with Android users because it lets people treat their phones as in-car GPS devices. Google wouldn't allow it, according to people on both sides. One of these people said Google viewed Apple's terms as unfair."
Seems to me that contrary to what you're saying, it's not that Google was refusing Apple to implement turn by turn, seems to me Apple just wanted to do it in a way that wasn't acceptable to Google.
And your whole article seems like hearsay to me. "People on both sides", "One of these people", who are these people ?