With Llano at 2.7 and 2.9 at VID's up to 1.4v there's no suprise that GloFo's 32nm is trash. They could have produced the same chips on their 45nm process with 1.15-1.25v considering they were producing Deneb up to 3.7 Ghz under 1.4v VID.
BD for some reason is less efficient performance wise, especially on the server side, had they added 300 Mhz to Magny Cours over 12 cores and a few hundred turbo they would have had a CPU that outperforms the 16 core by a significant margin.

"Stars" is a very efficient core when it comes to mm^2 to performance, on the level of Lynnfield at 45nm process. BD was quite a step backward from that, not sure how much we can blame the manufacturing process for that.