If the blue average is unchanged then generally just the jitter issues or puma issue and usually of little effect, i.e. cable always looks work than xDSL on the BQM.
Generally ADSL performs well latency wise and should be stable so long as backhaul is WBC or LLU based, which if in an area with virgin cable is more than likely.
You will need to remember though that if you start trying to do things like voice chat in addition to game play you may place some stress on the upstream side.
TIP Go for a provider with a 1 month contract and try it, and only cancel the virgin (though I'd be tempted to keep it for the larger downloads still)