I must say the recent changes, especially in HoH, have helped out heaps. Lot less lag, but the desyncs have happened ever since i've played on the server... (I've read nearly every forum post about lag issues, edited my eqclient.ini file etc)
I must say I really love the custom content and hard work the GM's do, otherwise I wouldn't put up with reconnecting all the time.
I also play from Australia, and i feel it's more a routing issue with timeouts and desync. Kinda feel that the lag and the disconnections/desyncs are separate issues. As a guild, we also have US based players desyncing heaps too. Guildie from France has never had an issue, and boxes.
I also want to point out that I'm not hating on the box guilds at all. I chat with them fairly often, and they are nice people. It just seems that the desyncs/timeouts occur when they are busy killing stuff.
Im not a techie server specialist tho, so it's just my opinion/feeling.