"Mybroadbandspeed" readings erratic

[#1]

The download speeds I am getting from the PN checker at the moment are about half any other site checker, and are very erratic.
Anyone else getting problems?
I'm on City Lifeline House  pcl-ag03.

[#2]

Yes, pretty hopeless, I would ignore it at the moment.

[#3]

See what Jo said to me in another thread! http://community.plus.net/forum/index.php/topic,103013.msg875628.html#msg875628 reply 7
It is wonky!