You may or may not have been aware of it but the United States (and parts of North America) have been under a huge cyber-attack. The cyber-attack map (Digital Attack Map) video was posted on YouTube by Google Ideas Oct. 21, 2013. The actual map of the current and continuing cyber-attack was posted on parts of the internet Oct. 21, 2013. Thanks to the twitter account of Haloefekti for this information. Hints of an attack may have been coming in as notes on The Hacker News Saturday, Oct. 19, 2013.
Per those comments/complaints on Saturday Level 3 internet connections had become (extremely) slow. The issue affected Time Warner, Digital Ocean and reportedly Facebook and other web sites and providers. Some platforms on Google Chrome and IEx are still slow in this local area. It is not yet known if the performance issues and the current huge digital attack are connected. If you follow the Total Attack Bandwidth Histogram near the bottom of the Digital Attack Map you will see the current attack "peak" on Oct. 14, 2013. The "attack activity" appears to have been mitigated since then.
Google Ideas has also been developing a mitigation digital attack tool - it is currently known as Project Shield. The Project Shield YouTube video was also posted on Oct. 21, 2013. Project Shield protection is currently available through invitation only. Even if your website is considered small it may still be worthwhile for you to request an invitation to this new protection service. If your sites have previously experienced TCP or DDoS attacks you may feel Project Shield may have some value to you. It is not yet understood if the protection against attacks will perform under a huge cyber-attack like today's.
Google provides a limited discussion about Project Shield at this time. More clues about the nature of the attack protection service may be surmised from parts of the Digital Attack Map. Click on the "Understanding DDoS" tab for more useful information. Under FAQs one finds that Google is not responsible for collecting the actual digital attack data used in the map! The data is provided by Arbor Networks ATLAS® global threat intelligence system. It is an hour-by-hour update of anonymous information on attacks from "over 270" ISPs. It is hoped that Google and ATLAS will continue to provide data, maps and protection against these huge cyber-attacks.