I have been digging for a long time now to figure out what the minimum bandwidth requirements are per concurrent vMotion. After a long time I finally managed to get a statement. In the past the statement was made that 622Mbps was the minimum required bandwidth for vMotion, it appears that this is incorrect for vSphere 5.0 and higher. With vSphere 5.0 a new feature called Stun During Page Send (SDPS) was introduced and this has decreased the bandwidth requirements from 622Mpbs down to 250Mbps per concurrent vMotion.
Always nice to know right?!