@MSP, if you check out the recent factory tour video, theres not a whole lot of handmade in the handmade part.
I rather think that its acutally us riders that are inconsistent.
Personally, i think Conti err towards the side of making tyres for winning races on, whereas other brands maybe lean towards a tyre average Joe can enjoy even when battering the most clumsy line possible through a rock garden after a heavy winter training regime of beer and curry. Just a feeling i get from the way products are marketed etc.
Nothing wrong with either approach, and i think the truth is that if you buy a top of the range version, its pretty hard to buy a bad tyre from any of the major manufacturers. Just some will suit some riders more than others.