They've been dealing with it since May.

https://www.siliconera.com/naoki-yos...-ddos-attacks/

Honestly is there any reason to suspect they are lying? Frankly I am surprised at the sheer length and persistence of these DDOS attempts; based on what is being seen on Netscout I think FFXIV is actually going into record breaking territory for DDOS attempts on a MMO.