My M350 connection has been upgraded to Gig1, I received the Hub 4 on Thursday and swapped out my older Superhub 3. Since that time my connection has been almost unusable at times, with so much packet loss that I can't even browse most websites due to the connections timing out (it took me several attempts to post this, for instance).
When a connection is established on sites like fast.com I can run through all of a speed test I do see the sort of speeds I would be expecting on the connection.
Should also say that I can see the drops if I set up a constant ping going out to 18.104.22.168 or 22.214.171.124, then also the same with an incoming ping (from a server in a datacentre) to the Hub's WAN IP address.
There are periods where it appears stable for a time and then others where there are more pings with requests timing out than actually replying.
Type 192.168.0.1 (192.168.100.1 in Modem mode) into your browser URL bar and press enter.
Hub 2 & 3 When the page appears DO NOT LOG IN but click ‘Check Router Status’.
Hub 4 When the page appears LOG IN then click ‘Check Router Status’.
Copy and paste the contents of the Downstream, Upstream and Network Log tabs onto here, if you get a yellow warning click the Post button again. Use one post for each tab if you wish. Please do not use screen grabs.
I powered it down for half an hour to be safe, now I've powered back on. Looking in Upstream all channels were still 32QAM, although as I'm writing this post I refreshed it and they decided to drop to 8QAM so not sure what's going on there.
I'll give it a few hours, see if it stablises or some magic happens, then I'll update with the stats then.
Thanks for your help with this so far Mike, appreciate it.