I guess this is the most logical place to share this with you. I do SEO for many sites. I've recently been focusing on two in particular for the same client. We used Netfirms SEO services to get links--he insisted--which basically consists of writing articles in broken English and placing them all over blog networks with our desired anchor text.
On the other site, I simply refused to employ those services. This was the client's main site, and was way too important to mess around with. I built links myself, the legit way.
Long story short, for months I watched the shady, black hat site climb and climb in the SERPs, while the white hat one kept falling.
This morning, I checked my SEOmoz campaigns and my white hat site went from #8 to #2 and my black hat site went from page 2 to no longer being in the top 50.
Just another example of what's been happening with Google lately and how great it is. Interestingly, the black hat site never got a warning in GWT about buying links.
Now I just have to figure out a way to break the news to my boss and tell him I told him so without actually using those words.