[Druid]

There is a good chance if your noticing it on several servers the problem is on your end or your route to the server.

The best way to check for spikes which would show as lag is to use a ping program set to run dozens of times.
You can get a nice free one here
[url:7de87]http://www.pingplotter.com/downloads/pngplt_1.exe[/url:7de87]
Set it to run 50 times and it will show any wild spikes at each hop. It will also show if you suffer from any packet loss.