Hah yeah, looks to be the same story as Invictus. Few days/1-2 weeks ago they sucked, and now they have 'good' aim. Waffles also posted he was going to let Invictus into the clan, etc. It also looks like autofire - it would have been better if you had taken a longer demo with them using other weapons, but this is pretty suspicious. Also, if you notice - they can't really aim. They're moving their crosshairs around wildly to find the bboxes of the dretches, perhaps waiting for the auto-fire to kick in. Another suspicious moment - during the very beginning of the demo, after he shoots the egg for a bit, he moves back, moves his crosshair down, then moves his crosshair back up to shoot the egg again. However, while he is doing this, his crosshair happens to pass over a granger, and he immediately fires a single lasgun shot at it, hitting it. He starts shooting the egg again, and only THEN notices the granger and starts shooting it.
Although this isn't undeniable proof, it looks to be enough. This is a shame.