i have just compared the traffic of ts2 and ts3. here is two screenshots. both are made when only one user logged on (me). ts3 server has only one channel. i do not understand what it sends? there is nothing to do.

my ts2 server consumed 7,13 GB in 52 days ( 137 MB/day). and my ts3 server 1,7 GB in 4 days (425 MB/day). ts2 server uses Speex 16.3 Kbit codec and ts3 server uses Speex 16kHz on 7th quality = 5 KiB/s. on the ts3 server are less users as on the ts2 server, but it cunsumes much more traffic.