I Wouldn't be surprised if it's a combination of the two as far as the "de-tuning" goes. I'm quite surprised by warranteed power upgrades, I'm hoping these don't fall prey to dealer inflation 8-(.
Overall, all the reviews I've been reading, say this thing is a pure beast.
The most consistant gripe between everyone is shifter feel, but honestly, that's quite subjective. Another thing that's consistant is everyone is applauding how well this car handles and how tame(unpunishing to the driver) it is for having so much power.