I should have pointed out in Reeder you can get an article back if it's been read. Simply tap the circle icon and it will bring it back. Sorry for the vague explaination but I'm working from memory at the moment. My iPad is not near.
I know you can get an article back tho b/c I have done it and also was interested in knowing if that was able to be done.
You can also slide the article to the right (when in landscape).
My conclusion, reached fairly quickly, is that Reeder is my favourite. I use my iPad almost exclusively in landscape mode and I was worried by all the screen shots that article reading in landscape mode doesn't use the whole screen width but in Reeder it effectively does because when you click into the full article it automatically puts its built in browser into full width mode whereas the other two candidates stay within the preview window and still leave the lefthand pane in place.
Yes, I think this is important feature. When going into the web view in NewsRack of Pulse in landscape, the text is often to small and it requires me to zoom in a bit. Reeder will bring it to full screen which makes it much better. And it isn't like you lose the quickness of navigation. Reeder makes it very easy to navigate. I feel like Rizzi put a lot of time into figuring out how to make the UI very functional and how to make the navigation in and out of feeds & articles very simple.