To make your client go faster, basically you need to do 2 things (if you're running win7, 3 for winxp)
1. Open the correct port for the downloader, here are the steps for it:
- Run the FFXIV Config file (it should reside in your Program Files(x86) > Square Enix > FFXIV Beta folder), click on General, make sure the UPnP is Enable (default is Auto) and remember the port number right below it (usually 55296)
- Log into your router and go to port forwarding (different router has different term to call this, so if you don't know how to do it on yours, post the brand name and model of your router), open this port to your computer (make sure you get your ip right)
2. Open the DMZ port (you may try the first step first, if it's still kinda slow, do this one, if the speed is acceptable after doing the first step, then skip this step), you can do it by going into your router, look under the Wireless section and under DMZ tab. Point it to your ip. It's not very safe to keep this open all the time. You should turn it off once you're done downloading.
For winxp, you'll have to turn on the UPnP function, I don't have any instruction on this, but you can easily google it.