Please check what you're regurgitating from 9to5 for heaven's sake!!
Radeon 5770? A 3 year old card? Look, Apple does not always use the latest and greatest, but to reuse the same card that's been the entry-level in the Mac Pro since 2010 would be a new low.
3.2GHz quad-core processor? There is no such processor in the Sandy Bridge Xeon line-up. There is a 3.2 Quad core Nehalem, but you can buy it right now in the 2010 Mac Pro.
It's more likely to be a 3.6 GHz Quad (E5-1620) or the 3.2 Hex (E5-1650)
2.4GHz 12-core ? There is no such thing in the model line-up that one would expect Apple to use
In the Sandy Bridge Xeon line-up you can get a 2.4 8 core (E5-2665) , which is ridiculously expensive, thus it would be a 16 core model (2x8) or you can get a 2.3 6 core. The 2.3 6 core (E5-2630) is less than half the price of the 2.4 8 core.
The 2.4 8 core costs about $1440. The 2.3 6 core costs about $612. Thus you won't see the 8 core in the entry-level dual CPU configuration. It's more likely to be a 2.3 12 core using the E5-2630 x 2.
At least try to get the basic facts right. Seriously, you guys.
Edit: I acknowledge that there is an E3 3.2 Quad Core, which was released in April 2011 and there is even an Ivy Bridge E3 3.2 Quad Core released recently, but it wouldn't make sense for Apple to suddenly start using the E3 series. The performance benefit from the 2010 models would not be worth it.
There is a 2.4 GHz 6 core, but it's the E5-4610, which is designed for 4 CPU systems and costs about $1219.
Those processor choices do not make sense based on previous trends.
Edit2: There is another thing that I've completely forgotten about...
The E5 - 24## series and specifically the E5-2440, which is 6 core 2.4 and costs about $832 each and supports dual CPU configurations. The 24## series runs lower TDP than the 26## and is meant to be the more light weight version. But this is designed for servers, rather than workstations, as per Umbongo.
Update: