A few days ago I began noticing some strange patterns in my analytics software for one of my sites, good ones, but patterns I couldn't explain right off the bat. The eCPM and CPC were rising steadily seemingly without any catalyst, pageviews remained steady.
The analytics software I'm using has always returned "Google - Organic" results, I didn't realise RSS content was lumped into that. Google Reader has been steadily increasing the number of people using my RSS feed, they added the feed from Google Reader, not directly from my site (which is why I couldn't track them).
I checked my RSS stats and was pleasantly surprised to find my RSS feed being picked up by nearly twice the daily average. The stats indicated Google Feedfetcher was the leader so I went over to Google Reader to see what was being typed in to find the site.
This site has one three letter main keyword and in the regular index the site currently ranks #21 out of 19.5 million. #21 may as well be #2 million, nobody goes three pages deep. On Google reader however the site returns at #3, the competition doesn't use RSS. To make it even better the #1 and #2 spots have improperly named their feed making them seem like spam a little. #3 is centered and looks good.
Google Reader is like a second set of search results, getting page one results CAN drive new traffic to your sites content, I'm seeing that first hand right now.