Absolutely-- especially when you drift out of the world of technology. Google is based on the "linkerati" (hat tip to SEOmoz) - geeks and bloggers who link to stuff aggressively. That works great in the worlds where people link (social media) but poorly if you're searching for non-geeky stuff.

I've been doing home remodeling a bit lately, and it's clear to me that there are NO home remodeling linkerati. But there are plenty of SEO guys out there and it only takes a few low quality links to top a lot of searches. So search for home remodeling stuff and you see plenty of adsense spam.