AMD presents "The Bulldozer Blog"

[informal]

I thought it was fairly obvious. Up to 50% activity, you have a full SB core with no HT load against 1/2 the module. Add in that Intel turbo >= AMD turbo (probably >> IMO), and there you go. For FP, at least in 256-wide work the module had to share to begin with, so the relative performance increase of half a module is greater when you stop loading the other half.

So you skip everything else I have written (because you know I have a point) and make a claim ,again,without knowing few important things like : a) intel's Turbo being much more aggressive than AMD's version ? b)a performance of "half the module" (you do realize that "half the module" is actulay a full fledged 4 issue improved integer core with an access to 256 FMAC unit,shared L2 cache+shared L3 cache and a new and improved Turbo Core ability?).
The perf. "penalty" of fully loading up a module is ~10% so single active core will be actually performing better even without the Turbo,let alone with it.