Not to be picky but isn't a coil SPLIT where you split the humbucker in two and a coil TAP is something to do with the little coils?
Absolutely right.
Split = Just using one coil of a humbucker. Only possible with humbucikers.
Tap = Taking 2 outputs from one coil, so one is full power and one is lower power. Possible with singles and HBs
Its a pretty clear distinction and I have no idea how the confusion between them persists.
I have a split C-Pig and Cold Sweat. Pretty constistent with whats been said. The C-Pig split isnt very single coily but is usefull if you need cleans in a hurry from a full volume C-Pig, or a more penatrating sound. The neck split still isnt a perfect SC, but its much more like it and is useable for anything you would normally use a SC for (provided you arent an SC purist. Not that theres a single thing wrong with that (he he) but you'll pick flaw with the sound).
You gotta remeber, basically split = SC electrically, but not tonally. Its roght smack next to another coil and that affects the tone.