I disagree with PassMark. I write batch apps in COBOL...
In any case, as of a few days ago we started collecting data on single threaded performance of different CPUs as part of the PerformanceTest V8 beta release.
You can find a table showing the single threaded performance of some common CPUs here. More extensive graphs are coming soon.
Update 11/Oct/2012: New single threaded graphs are now available here.
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