Actually, that brings up an interesting point.
If they replace the 1.83Ghz with 1.66Ghz and 2Ghz with 1.83Ghz, will people choose a FASTER laptop without 64bit support, or a SLOWER laptop with 64bit support? If only the CPU is change and there are no major achitecture changes, will the people who have waited for C2D macbook burst into tears?