There's a cultural perspective we need to bear in mind:
We non-Americans get all consternated when we hear about lawsuits in America, and shake our heads in wonderment at how litigous they are. For us a lawsuit is a Big and Serious Matter.
That is not the case in America. It is (still, mostly) a country of clear and well-established property rights, and the normal way of resolving disputes is to submit them to an impartial arbiter for resolution, very often the courts. In the IT world this is a pretty standard way of arriving at mutually-accepted interpretations, not the least because everyone is conscious that assets like patents involve other people's money (ie the shareholders', not the company's money). For most Americans, the fairest and most equitable way of resolving issues is through the courts, because it's evidence that you're acting responsibly. This system works well most of the time.
Unlike in SA or many Olde Worlde countries, suing or getting sued is not a big deal. If your neighbour dings your car, the polite, accepted and expected response by the perp is "please sue me", because that kicks off the legal process of recovering damages, and it involves insurers who cater exactly for this. It ensures everyone's happy. There's no personal or other animosity whatsoever.
When you step back from our local-yokel perspective and understand this, you'll see that suit and counter-suit is actually a pretty gentlemanly way of submitting difficult disputes to an impartial third party. Also, don't forget that 99.999999% of deals by and between Americans are done quickly and informally - the USA is after all the Land of Business, and they don't get wrapped up in silliness. When it comes to dealing with foreigners, it can be a very different matter...
Edit: I say this because I've worked with Americans for 30 years. It took me a while to understand.