Instead of taking a snap shot of the network. Use Ping Plotter and have a look at it over a period of time and see what results you get then. You might have an intermittent problem.
http://www.pingplotter.com/download.html
Standard version is 30 day trail, but does work afterwards tho
A few settings I use:
(main screen - bottom left)
Trace interval: 1sec
Samples to include: ALL
Under:-
Edit >> options, select `packet'
change drop down menu at top from `ICMP' to `UDP Packets', then OK your way out and enter the IP address and hit trace button.
When you do start tracing, right click on graph and select 5 min time scale.
You should get an image like the attached. Fingers crossed not as bad as last weeks tho (3rd August 2008). I've finally got my capacity upgrade (I think, subject to change). Whoohoo after 9 months of bad latency and yo-yo download speed. Five days now good latency and also constant 19600 kbps download speed day or night.