No, but I think the Colossus's sacrifice was clearly meant to be portrayed as effective (in the dialog, and in the next mission briefing.)
I'm not sure what the argument is here. Unless the Shivans literally send a continuous, solid wall of pure Sathanas through a given jump node, destroying their ships and / or delaying them will certainly lighten the load on convoys, whereas simply parking ships in a convoy and defending them is a much worse idea (because of the overwhelming firepower of Shivan ships). One has a good chance of delaying a large number of Shivan forces for at least a few minutes, the other could be easily resolved by a single Lilith.