Quote Originally Posted by informal View Post
1Ghz advantage ??Lynnfield is almost identical to i7 and i7 is on average 22% faster per clock than Deneb and C2Q...There is stuff that it is marginally faster or even slower and there are workloads(SMT aware-not that many of them) that are much faster than Deneb/C2Q.It boils down to what users mostly do on their PCs.
One advantage that i5 may have over Deneb and C2Q is that high Turbo mode for 1/2 cores.Other than that,the 2.66Ghz model without HT will be roughly on par with 2.83Ghz 45nm C2Q with Turbo being its saving grace in mono and dual threaded apps.

edit:
For enthusiasts the "turbo mode" advantage i5 may have over c2q/deneb is not important since this group of users usually OCs their chips anyway regardless of CPU they use.The turbo thingie on i5 will be good for those retail systems that can't or won't be OCed by "normal" end users.
Sorry, I was going off the numbers in this review, not the ones in your head.