I got this question:  Does VMware ESXi have the capability to effectively use OS Control mode?  Which option is recommended for VMware ESXi 4 and 5?

Answer:  See page 5 of the below document. The recommendation is OS Control if DRS is in use.  

http://h20000.www2.hp.com/bc/docs/support/SupportManual/c01732803/c01732803.pdf