Thank you for that. I think you have done a great job overall going in this direction. I loved http://www.smashingmagazine.com/2010/05/18/the-beauty-of-typ... posted earlier this year. I understand it's impossible to make every single article aim for perfection but now that you have raised the bar for yourself and we know about it, you have no choice but to meet it every single time.
The first thought in my mind when reading the current article was how the color difference between left and right slides affected my perceptions and hence completely negated the subsequent analysis. For a second I actually thought it would be funny if I made a parody article and switched the left and right slides and justified it with copy-pasted text from your own article.
I love typography and I try to learn more about it any time I get. But unfortunately, despite reading the entire article, I left away feeling like I learnt nothing. It's hard to say exactly why but just compare the current article with The Beauty Of Typography and you'll see what I'm trying to say here.