Why don't you collect some data from both providers for about 30 minutes or so (each), then save off a .pp2 file for each one (File -> Save Sample Set...) and email both of those to use at support@pingplotter.com. Screenshots are nice, but PingPlotter data files are nicer for being able to do analysis of where the problem is.

If you send that over, we'll have a look and post back here with any more information we find from doing that. When you email us, please let us know that it's OK to post pictures back here.

- Pete