It's not just you. A number of people in one of my guilds, including myself, have mentioned the same thing. My latency is normally below 100 and recently it's been hitting frequent spikes of 999+ with periods of time where it's in the 500 range for 5-6 seconds.
The bad thing is that since there is no maintenance this week unless a large number of players, or ZOS employees that play and see it say something, there will be no server reboot to try and correct it.
Use the information in this link to troubleshooting by ZOS. I just ran it and the problem I'm running into is with a hope in Charter's system and I use Spectrum. That's not to say something still isn't going on but it doesn't appear to be only with the game server.
ZOS keeps adding new content without adding server resources to support it. Instead they keep spreading the game thinner and thinner over the same rack space. The inevitable outcome is performance degradation. Simple as that.