I have just installed PP to try and trouble shoot a wireless LAN (which, btw is accessing the Internet via a wireless IPS).

Here's the scoop:

from the command prompt, if I ping my website at work I get an average ping time of 186ms, with most appearing under 200ms.

from the same machine, same network, but using PingPlotter, I'm getting average ping times of 450ms with a lot hitting or exceeding 500ms.

Why the big difference in times?

I've tried trimming the packet size down to 32 bytes to match the ping packet size - I even trimmed it down to 28 (the smallest size apparently recommended).