Network Test on wired sb3 player showing slow performance (< 75% at 1000kbps)

Hi

I have the following LMS server:

Logitech Media Server Status
Logitech Media Server Version: 7.7.3 - 1375965195 @ Mon Aug 12 03:09:39 PDT 2013
Operating system: Debian - EN - utf8
Platform Architecture: x86_64-linux
Perl Version: 5.14.2 - x86_64-linux-gnu-thread-multi
Database Version: DBD::SQLite 1.34_01 (sqlite 3.7.7.1)
Total Players Recognized: 3

I have a wired-only SB3 which I am using for testing and I see Network test at 100kbps shows 75% or less. But I need 100% as I am streaming FLAC music.
My SBBoom reports similar when on a wired or wireless connection as does my SB2

My SB3 is plugged into a Netgear gigabit switch and so is my server, and that has a gigibit NIC in it. So the network between them is simple and fast. There other devices are on this LAN, but nothing major. I have disabled most of the Squeezebox plugins and I now have only the BBC iPlayer plugin to speak of, but still the Network test shows this slow rate. My setting for the database is on High performance, as recommended, since I have > 1 GB RAM

Can anyone confirm that I should be seeing 100% on the 1000kbps setting? I'm sure it used to show 100% even on the highest 2000kbps setting last time I looked. Also, are there any other network performance tools for the LMS that I could try?

Everything on my network seems ok, and my server looks fine too (load average is 0.1) so I cannot understand why the Network test is showing less than 100% for the 1000kbps Network test.

Any suggestions?

Thanks in advance