I remember discussing this exact subject with a fellow Mac user back in seventh grade when ADB keyboards were in the process of being phased out. Apple's ADB keyboards had the bumps on the D and K, as did many of their older keyboards (but not all--the original short Mac keyboards don't have any bumps even though bumps are present on the IIe Enhanced).

The standard F and J bumps came around with the first USB keyboards in 1998.