Some ISPs have experienced fewer DDOS attacks overall during the last six months. It’s a matter of quality, not quantity: “When DDOSes do occur, they are done with much greater purpose than they used to be,” says Rodney Joffe, senior vice president and senior technologist for Neustar. The tool that is being used by tracing the ms per second and then if the site goes down or just get a lot of traffic it will report the time that the attacker started his attack, that is really good.
Source: https://thehackernews.com/2011/09/ddos-tracer-10-released-by-maxpaincode.html