Addendum: After this story went live, Chris Wolf of the Burton Group was given an opportunity to explain the position more clearly: "Burton Group has consistently maintained that our criteria is based on large enterprises virtualizing heterogeneous workloads. Since our evaluation criteria was announced in February, we have maintained that while we provide a guideline, customers know their criteria best. It is up to each customer to select the evaluation criteria that is absolutely critical for their needs. Oftentimes, select criteria that we list as "preferred" or "optional" is considered essential by some customers, or for certain workloads such as virtual desktops. Hundreds of enterprises, both small and large, have used our criteria as the baseline for their RFPs and virtualization product decisions. In nearly all cases, the criteria were adjusted by the individual organization to reflect their virtualization needs. That being said, I understand Microsoft's position with regards to our criteria. Numerous Burton Group clients run production workloads on Hyper-V today, and do so with our full backing. As a fully independent, vendor-neutral research firm, Burton Group will continue to recommend what we feel is the right technology for each of our clients' unique situations. It is our hope that our evaluation criteria will continue to be used by user organizations as the baseline for each of their comprehensive virtualization platform assessments."