They will put out sound either way, but the lug that the ground wire is attached to also has a ground wire that attaches to the metal chassis of the pickup- if you were to make that the "hot" connection, then you would lose the shielding benefits, and might also get some nasty popping and buzzing anytime you touched either the metal casing or the polepieces!
I'm surprised he doesn't sell them with leads attached, because I recall specific posts from him before (on the Dudepit) warning to use care when soldering these pickups lest you inadvertantly overheat/damage the more sensitive coil windings. Seems like installing the leads himself would make this much less likely to happen via a novice solderer!
FWIW- I had my Darkstars sent to a luthier that was doing the routing for me years ago and they came nearly 2 weeks after the estimated delivery then as well. A 2 week or so buffer just seems to be Fred's thing- definitely well worth the wait though...
I did ask him if he could solder the wires himself, i didnt want to take the risk of damaging them.
He never answered the email and didnt do it...
Guess he doesnt check his email that often!
