Intelers are in denial
As I have shown in this comparison: the C2D and K8 architecture are neck to neck in terms of performance. Except the SSE advantage, the only trick C2D has is cache. Once the cache is reduced to the same level of K8, the C2D loses its advantage. Similarly, when C2D's cache is not enough, it's also slower than K8. As we noted earlier, 3GHZ Opteron conclusively frags 3GHZ Woodcrest in both integer and floating point computation.
Essentially, Core 2 and K8 cores have equal IPC in terms of integer, and Core 2 is at least 15% slower on FP.
K10 core will have 40% IPC lead over Core 2 on integer (per core).
K10 will have 200% IPC lead over Core 2 on floating point (per core).