I am on the 50meg service and upload speed got upgraded so i got a reasonably constant 4.7 meg upload.
However since i fitted a VM Superhub this has dropped to 2.4meg at best.
No problem with download speeds which remain the same at 50meg.
According to the Cable Forum my modem stats are spot on so i have no idea whats causing this issue.
All tests were carried out with a wired connection.