So... I think it'd be cool if we here in bassland got into the habit of posting videos of playing things that are very difficult to split. Sure, that may sound a little vague, but check out this video and you'll see what I mean.
If anyone is still interested in this topic, watch anything that the Bluecoats bassline in the past few year (Frank) has played. They have no issues going into the fast splits of this kind.