Massively notes a couple of indications from Trion Worlds that they are once again experiencing denial of service attacks in RIFT, after similar reports about a month ago. There's word in a forum thread about lag, saying: "Adding on top of the oddities that people are reporting, we've also been under DDOS attacks and our network team has been working to minimize the impacts of these." There's a bit more on Twitter:

Ascended, our servers are experiencing a DDoS at the moment. We're working to restore network stability as quickly as possible.