Are you talking about the 991.2 C4? I just ordered one (as you know) in the US. Those allocations are fairly rare because few people want it. If a buyer can afford a C4, then they can afford a C2S which has higher status and performance numbers. Not as many people want the C4 so PCNA doesn't allocate as many. Dealers have to barter with other dealers and trade allocations which is what my dealership had to do. There are a ton of C2S allocations.
I was originally going to get a Targa 4 and those are really rare. At the time I queried, there were only 3 allocations available from all dealers in the entire US. No way would I have gotten a discount on that one.
But at the same time, the C4 is not a GT3, GTS, etc. If you want one you will get one. The dealer just has to do a bit more work and he may be using this "rare car" phenomena as a price negotiation tool.
Mark