I noticed some interesting numbers in my website logs that suggest a significant shift towards aggregator use when reading this blog.
In October, there were 772 unique IP hits to the full-text atom feed. In November, that number was 941. That's a more than 20% increase.
However, October saw 3228 unique IP hits to blog pages compared with only 2600 in November. A just under 20% decrease.
Now this might not have been caused by a shift from people reading in a browser to people reading in an aggregator but it does seem plausible, even likely.