i have had 2, both below 1.25v 5ghz,
Xtreme addict had 24, only about 6 i think were below 1.35v for 5ghz, only 2 gems that do 6.5,
so i guess you can say in this batch you have a 1/12 chance of a ultra gem, or 1/6 chance of 6.4ghz 32m decent cpu.
If you can get your hands on it go for it!