Proof that Telstra Bigpond is Throttling Youtube Bandwidth in Australia?

Are Telstra (Bigpond), Australia's largest Internet Service Provider deliberately throttling (capping) Youtube bandwidth on all of their plans? (even the best Bigpond Cable Elite plan)

UPDATE: The day after I posted this video Telstra contacted me and finally admitted the problem was systemic across all users and said they would fix, they did a few days later.

Try it yourself:
http://www.youtube.com/my_speed

My speed:
http://www.eevblog.com/images/telstra/MyTelstra.png
Other Telstra customers:
http://www.eevblog.com/images/telstra/Telstra1.png
http://www.eevblog.com/images/telstra/Telstra2.png
http://www.eevblog.com/images/telstra/Telstra3.png
http://www.eevblog.com/images/telstra/Telstra4.png

Other ISP's:
Internode: http://www.eevblog.com/images/telstra/Internode.png
Netspace: http://www.eevblog.com/images/telstra/Netspace.png
Optus: http://www.eevblog.com/images/telstra/Optus.png
TPG: http://www.eevblog.com/images/telstra/TPG.png
Exetel: http://www.eevblog.com/images/telstra/exetel.png
iiNet: http://www.eevblog.com/images/telstra/iinet.png