I'm certainly prepared to say that I owe a lot to WPW and the advice that its gurus keep handing out and share with us so selflessly. It isn't one thing, though. It's several ideas/suggestions and an ongoing message that I think can be summarized as follows.
1. Content is a major reason for getting yourself well placed in the Search Engines. The more there is of it, the more focused it is, and the more it's written for the visitor rather than the search engines, the greater your chance of overtaking your competitors. In effect, a thousand words can be better than a single picture!
2. The proper choice and wording of meta tags, especially Title, Description, and Keywords, does make a difference, whether Google takes any notice of them or not. H1 headings, use of alt tags, limited reliance on frames and java, and similar
SEO "mechanisms" also help. A lot of little things add up to a whole heap of difference!
3. Comparison with competitive sites and an open minded examination of them, particularly if they have better positions than you do, makes a great deal of sense. It's also far more helpful to you than giving vent about the unfairness of it all. If Google thinks you aren't as good as you think you are, try to fathom out the reasons and change what you're doing accordingly. Don't fight 'em, join 'em!
4. Allow for and recognize that there are differences of opinion in the posts here, and most of them are healthy. But look for the "common denominators." Don't rely on a single opinion, settle for the consensus.
And let me say that I didn't know, let alone understand, one word of all this when I first became a participant in WPW a year ago. I appeared here and there alongside (and often enough lower down than) a good half dozen local competitors, but there's no doubt that I now stand head and shoulders above them. Admittedly, some of it is the result of the Florida Dance that took a very jaundiced approach to real estate sites (not without some justification perhaps), but I'm throughly convinced that, thanks to what I learned from WPW, I did more than escape Google's wrath. I seem to have been pointed by the posts here in all the right directions.
Success doesn't come overnight, but the rudiments of it are certainly contained in these various and lively threads of ours.
Duncan