Well, in my experience this argument can go on for ages, so I'm not going to get into the specifics but just state my own experience with this. I'm sure many of you have had a similar experience where as some have had a different one. I've noticed that if I submit a fresh page with unique content and a decent keyword density the page tends to land on page 4 or page 5 of Google nearly within a week that is with only a few backlinks (not more than 3 or 4). Similarly, I have been trying to promote various other pages of my website which may not have a decent keyword density and no matter how many links I generate they are not to be seen on Google at all. I think this is something many webmasters should put into affect, I still see various people everyday who spin content around or copy them from other sites and then complain how their websites are not being ranked or get sandboxed. So in general, what do you people think of this?