2080915 knumbers/sec on the one I just checked.
Under the covers, its Xen virtualization running on 2x E5-2670 CPUs - with the 32 vCPU instance, you are basically getting the entire physical server with a little overhead for the virtualization part.
That's not too shabby. Considering I only use 3 cores, I could squeeze out 630000 knumbers out of all 4.
3.5x (based on the price) 630000 = 2205000
Basically same bang for buck, mine is slightly better. My bad experience with Amazon was based on the normal EC2 instances, so thanks a lot for the tip about the spot instances. Although having a root is very convenient.

lol we have the same server. hetzner
Gotta love them, it's on and mining hard for a half year, no downtime yet. Plus a website and some game- and ts3-servers. Can't recommend Hetzner enough.
Sorry for slightly offtopic.

edit: corrected calculation