AppleInsider:

In the study presented on Tuesday, IBM says that employees that used Mac machines were 22 percent more likely to exceed expectations in performance reviews compared to Windows users. Employees generating sales deals has 16% larger proceeds from Mac users as well.

Turning to employee satisfaction, the first-of-its-kind study shows that Mac users were 17 percent less likely to leave IBM compared to their Windows counterparts. A team of seven engineers is needed to maintain 200,000 Macs whereas a team of 20 is needed for that number of Windows PCs.

This is interesting but not “news.” Even back when I worked at Apple in the late 90s, Apple knew enterprise Return on Investment (ROI) was significantly higher than Windows in “mixed-use” environments.