This would be because it's not really news - advertising complaints are made by all sorts of companies all the time and are not upheld - Virgin have I'm sure made plenty about Sky and BT that weren't upheld either.
You would hope that the vast majority of Virgin's ads don't infringe, would be a rather messed up company if it were newsworthy for them to produce standards compliant advertising don't you think?
Jo - since they became Virgin Media the
last thing I would accuse them of is not blowing their own trumpet, quite the opposite the flood of PR from them has been enormous, and along with that there have been a flood of upheld or partially upheld ASA complaints.
Just FYI from a few weeks ago here's an
upheld complaint from Sky regarding VM,
one from the month before where 6 of 7 points were upheld, it happens all the time and is really nothing noteworthy. They both snipe at each other, sometimes one wins, sometimes the other.