This is just a very grim indication of the fate of the rest of the uprising when Gaddafi is through with them. As stated succinctly by Ranj Alaaldin for the Torygraph, “he has bided his time, tested the West’s resolve and is ready to take Libya back“. Given that Gaddafi is highly unlikely to run out of cash and it’s even less likely to run out of bullets/mortar rounds (all sitting prettily in his desert depots that are safely away from rebel regions) before the rebels run out of warm bodies, it’s very likely that even if any sort of limited international military action was agreed upon, it would be far too late by the time of implementation to really matter.
With the tide turning it will also see the end of any potential defections from Gaddafi’s military units, which means the status quo is overwhelmingly in his favour. The rebels will only weaken over time, even above their depressing logistical, command and technological inferiority issues, and the rate at which Gaddafi advances will increasingly pick up. With the EU/NATO paralyzed in disagreement over any sort of action beyond vague recrimination and seizing of liquid assets, much less push anything through the UN Security Council with Russia/China playing their usual spoiler role, it would not be surprising to me if his troops were outside Benghazi in a week, clearly a strategic objective if Tobruk is to be recaptured.