Searched occasionally. Not really noticing specific people quitting (although I did know a number of people who quit), but the server as a whole seemed a lot emptier than it had been when the server was merged and when the update happened. Also saw a significant influx of posts on FFXI forums about people quitting (citing FFXIV's release) as well as an increase infrequence of the obligatory "Goodbye, Vana'Diel!" shouts in Whitegate.
Regardless, no many people I knew planned on sticking around.