It appears from the charts in the review that Intel made improvements to boost multi-threaded workloads apart from HT. The boost from the 760 indicates that well-threaded code should get a nice boost in performance, while enabling HT seems to have a lesser effect based on workload. Seems they are trying to address some of the shortcomings with the previous implementation of SMT, such that well-threaded code will still get a boost in performance and (likely) take less of a hit with HT enabled...