Chrispcritters - 6:30 pm on Oct 10, 2013 (gmt 0)
My belief in my current adsense revenue slip is a combination of both the new format and the new quarter. I've also seen a slump in other networks as well. The trend is starting to turn towards what I've been seeing as the trend for the last 60 days (aka "normal") with adsense moving back up, but slower than the others.
On other projects I work with a number of advertisers and none of them have given any thought to holding back advertising because of government shut down. If the debt ceiling is not lifted there are likely to be wider economic issues and will move us into an "all bets are off" environment where some advertisers will stop spending while others will choose to buy mind-share at a lower rate. How this will impact any specific niche's adsense earnings will vary.