I'd be willing to bet that you've got a 99% chance of getting a 2.0 if you ordered it from a company that turns out alot of sales.
The only issue i've heard of is the corruption while running SATA RAID, which apears to have been fixed with the new bios...
other then that temps, slight overvolts and such...the usual mobo problems (both of which, again...apear to be fixed with the new beta bios)
you wont regret your purchase...just get some good ram