Running in new tyres ...

Got some BT 0023 on Friday on the way to work.

Chap said 100+ish careful miles (and then added dry as it began to drizzle) before using normally

So then....

a) What's the equivalent wet milage on new tyres to break them in?
b) Is it mainly to get the waxy sealant off from the mould ?
c) Has that happened when most of the the wibbly hairs are off the mid sections?
d) I don't suppose you cna scrub them down with wet and dry paper to assist this in a safe-ish manner

So far I've managed about 50/50 miles in each weather condition so far and can tell they're not quite ready.