I keep reading here and there on forums like this one that HT is problematic on the new line of Mac Pros. Is there any actual hard evidence (i.e. benchmarks, or at least something from a reputed reviewer) for this? I remember similar issues being brought up when Intel launched HT technology in early 2000's, but assumed everything has been resolved in this re-launch of the technology. Has anyone switched off HT on their MP, if so, why?