Whatever you want to believe.
Mind letting me know what sites you've ranked? The site in my sig I got to the top of the second page in under a month, in the US. (Didn't attempt to rank in the UK, advertising standards doesn't let you use the term bad credit) That term gets 100k exact searches a month, and the entire first page is optimized for the term. All at least 6 years of domain age, and 2k+ backlinks to the URL, and most have 15k+ domain backlinks. I was also on the first page for a bit.
I'd be ranking first right now, but a person I hired for something did the job incorrectly and got me sandboxed for a month. It's back, now, though, and once I've got my latest project to number 1 (500k searches a month, £30 commission for every product ordered) I'll come back to the loans site.
These are just a couple of examples of my SEO portfolio. Now, how about you?
And, mind explaining why you think the basic SEO strategy I outlined for the OP's site wouldn't work?