Yep, Superhub has it's own issues and they are working on a new version of the firmware. Firmware updates for the hub are pumped out by Virgin and they update themselves.
The latest traffic management was "Upstream P2P" and is effectively aimed at stopping or severely crippling torrent/newsgroup (P2P) traffic that will hog a lot of bandwidth, this was implemented on the 17th March and is when all the Xbox/PS3/PC online gaming issues began.
The problem is Xbox Live and PlayStation Network implements P2P for a lot of multiplayer games (Black Ops, Bad Company 2, Fifa etc etc) and the host is picked each lobby based on their available upstream bandwidth (which, with Virgin Media, tends to be quite high and thus you get picked).
It would seem (just from a semi-educated viewpoint) that Virgin haven't done enough to separate the P2P generated by Xbox and PSN (which all run over the same ports as defined by Microsoft/Sony) from other P2P traffic. I'm fairly certain it can be fixed/rectified in good time, I just don't think there was enough of an uproar at first due to the laggy nature of Black Ops in the first place.
The 5 testers from the Virgin forum last weekend had their traffic management turned off, two of whom posted in the topic and said their experience was a hell of a lot better for this. However the admin of the board came back and stated the problems were still there. So either those on the forum were unable to relay accurate information and skewed the results away from P2P traf/man being the cause, or indeed the traffic management isn't the cause.
I believe the former, and I've got myself in the fortunate position of relaying accurate info (through packet dumps etc.) back to their head offices of my playing experiences tonight. Hopefully I can provide them with an accurate timeline and enough data that I've gathered (various websites providing ports that the services use and any packet captures at my end that Virgin wish to use) to do my bit to help quickly resolve the issues.
As a disclaimer, I do not work for, nor am I associated with, Virgin Media in any way; I'm just a customer who was unhappy with the sub-par service and pushed the issue as high up as I could.