Those numbers seem pretty high, but without comparison to workers in the tech sector as a whole and workers in the US as a whole, it’s pretty useless data. This study does seem to show that these execs are using drugs at a much higher rate (if you trust the OP article methodology) than other information workers, but I don’t think that should suprise anyone, since workplace stress is usual higher for execs. The other difference is that they have a lot more disposable income than most workers to spend on drugs and other coping mechanisms.