So I took delivery of the hub 5 today. Have yet to plug it all in - on my list to do later and hopefully be able to see if via the 2.5Gbit port into my routers 2.5Gbit port (can be selected as the WAN port) I'm getting the full speeds into the router.
So the answer to that is yes it can:
I have however logged something on the community forums as the upstream doesn't look right.
Status Page
Acquired Downstream Channel(Hz) 330000000 Locked
Ranged Upstream Channel(Hz) 53700000 Ranged
Provisioning State Online Operational
Upstream (not locking at QAM 32)
1 53700000 40.3 5120 QAM 32 10
2 46200000 39.8 5120 QAM 32 11
3 39400000 39.3 5120 QAM 32 12
4 32600000 39.3 5120 QAM 32 13