The General didn't get time to show anything other than some way-amped TK and more body modification than I think Big Giant Head will have as his brain is able to hold much more psychic power per square inch. However the mooks had the PreCog (as well as instant edit costume change) after being exposed about 7 seconds, and Launchpad got longer than the General that according to FOWL's machinery (11 seconds at least -
starting 3:50ish), as he was only exposed for 9-10 seconds (20:31ish). That tells me that the Better the mind is, the stronger the Norma Ray's effect is, as opposed to Launchpad's empty mind having any effect.
However, as he's the one with the most feats . . . Launchpad displayed not only PreCog but Ranged Multi-target Pyro/Cryokinesis, Multi-Target TK capable of fine-lifting multiple objects (Putting a burger together while lifting a House, a kid, and a Fridge) and capable of sending folks into space and back in a few seconds, TK-Flight, Reconstituting a Norma-Exploded Lizard, and finally a blast of TK energy. Note that most of this was subconscious.
As for PreCog lets see what Launchpad foresaw:
-a Fire engine 7 seconds before it could be heard
-Gosslyn in time to stop her breaking a lamp
-a phone call early enough to say so before it rang
-the Muddlefoots coming over early enough to walk over and open the door for them
-the theft of the Norma Ray before the villains even arrived there
-The Death of Darkwing Duck long before he ultimately prevented it
-Being attacked early enough to comment on it
-Lackey's head injury and nearly instant Space-Trip seconds beforehand (Predicting his own ability's effects beforehand)