There's nothing new about this wording. It's been common and established for a very long time. To me it's clear and correct (barring shenanigans like those in

There's nothing new about this wording. It's been common and established for a very long time. To me it's clear and correct (barring shenanigans like those in the linked article). Here's a search for some instances from the 1800s: https://www.google.com/search?q=%22three+times+faster%22&biw=1368&bih=801&tbs=cdr%3A1%2Ccd_min%3A1800%2Ccd_max%3A1899&tbm=bks&ei=JAJhY_vaBLbj4-EPkeyBOA&ved=0ahUKEwj7_KvX74z7AhW28TgGHRF2AAcQ4dUDCAk&uact=5&oq=%22three+times+faster%22&gs_lp=Eg1nd3Mtd2l6LWJvb2tzuAED-AEBSPosUNsXWOclcAB4AMgBAJABAJgB5QGgAdcKqgEFMC41LjKIBgE&sclient=gws-wiz-books https://www.google.com/search?q=%22three+times+faster%22&biw...