ISP: Verizon FIOS
Location: USA (New York City)
Connection is fine until prime time hours (7pm-11pm east coast). During these times, significant lag is present (1-5 seconds of action followed by 1-5 seconds of FFXIV "catching up".) No other connection issues present, can watch streamed video and download files without issue. Services such as WTFast and Pingzapper eliminate the problem completely.

The same problem has happened several times before, such as when Ramuh was released and lasts for weeks at a time. Unfortunate to see that this issue has returned.