Hmmm...
If you had a modem before and not a Superhub moving from 10Mbps to 30Mbps has put you from the legacy network to DOCSIS3 and you may be unlucky enough to have a torrent freak nearby causing congestion. Now you are on DOCSIS3 there is no going back unless you can get back to your old modem as downgrading to 10Mbps with a Superhub will leave you on DOCSIS3.
Set up a
TBB monitor and post it up after a day's worth