This has also been happening for a little while for me, and is now a big problem. - I'm on TPG FTTB - Speedtest on laptop and iOS devices on my home WiFi and Ethernet: typically ~92Mbps - Built-in speedtest on Xbox, when on my home network connected to TPG: ~90Mbps - Xbox Game download, when on my home network connected to TPG: will typically be as slow as 200-300Kbps. Occasionally it will ramp up to 40-60Mbps, but only for a few seconds / 1 minute. It's almost always less than 1Mbps, and often as low as 200Kbps. - Xbox Game download, when the Xbox is tethered to my mobile phone 4G (vodafone): an in-progress game download will *immediately* ramp up to 30-40Mbps, and *consistently* maintain that download speed while on the Vodafone 4g network. - When I switch the Xbox to go back to the TPG connection, the in-progress game download *immediately* drops down, back to as low as 200-300Kbps for most of the time. As noted above, the issue is isolated to just Xbox game downloads, on the TPG network. Telephone tech support took a while to convince of the problem, but eventually we did a traceroute to one of the relevant URLs (assets1.xboxlive.com) on my laptop - and it shows consistent, repeatable delays in jumping from a tpg to aapt IP address in the route, which someone else has noted in these forums (TPG/AAPT are in the same company). That route and delay doesn't exist in the traceroute when my laptop is tethered to my mobile phone 4g connection. At their request, have sent the traceroute data to their engineers there for further analysis.
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