I realized as I was reading this that I know very little about sociology as a discipline. In particular, I'm unaware of any of its "Great Theories", a la General Relativity for physics, or Darwinian Evolution for biology. Any candidates? I'm not trying to be snide, I really would like to learn more about this. The Wikipedia page for sociology describes "theories" that sound more like schools of thought.
The problem is, though most of Hanson's theories have plausible explanations and "feel" right, there is very little experimental evidence and very few studies are directed in that area. In fact, you might even say it is a symptom of that type of signalling itself: as homo-hypocritus, we don't want signalling theories to be proven true so we make up reasons for deriding signalling explanations as not rigorous enough to even merit being properly tested or studied. Of course, this too is no better, because then do we just actually have no evidence to believe in signalling explanations, or are we using signalling excuses to suppress the meaning of that evidence? It's somewhat self-defeating.
The next most important theory I would posit is Prospect Theory by Kahneman and Tversky. But there again, many aspects of it have not been successfully replicated, and too often limited experiments are generalized too much.
One set of social theories that I would love to see given more quantitative foundations is the research from the book Moral Mazes. Robert Jackall carried out some lengthy longitudinal studies in which he collected anecdotal narrative and interview data from employees at all seniority levels through a couple different firms. He was able to see people rise up the corporate ladder, people get fired, executives fired and replaced, large layoffs, etc., and conduct informal interviews with employees all up and down the ladder.
Based on his interviews, he put together a series of theories about how morality and ethical identity form within bureaucracy, and particularly how managers develop an understanding of ethical obligations to subordinates, and how certain factions of an organization (notably HR) come to function when there are competing concerns between ethical expectations and bureaucratic mandates.
In every job I've had, it's been a frustrating experience of basically saying, "Yep, I know this chapter from Moral Mazes ..." because companies operate almost as if they've read the book as a field guide.
Yet at the same time, it's still just a qualitative study that is scaffolded by academic sociology. If it were actually possible to collect that kind of data from corporations, I'd love to see some theories from the book explored more quantitatively.