Never had any lag really, or serious glitches, at any given time. Hopefully though servers are not at maximum capacity yet. I mean, the headstart has just begun, there's going to come a lot more people every day from now on, flooding the servers. It sure felt much more populated today than it did yesterday (at least in the fields, tons of people on the roads and fighting stuff too). Wonder what it will be like on official launch day and the days after...
FFXI: Rynaria - Mithra on Kujata [retired]
FFXIV: Fancia Dragonkeeper - Miqo'te on Besaid