I'm kidding. I think it's more likely that Apple knows that the current $600 price for a single share of Apple stock is not sustainable. That means the price will go down eventually, which might be interpreted in a negative way. So I would guess that Apple is planning for the inevitable decline. Of course, buying stock just to keep the price up is only a stopgap measure. Eventually Apple will run out of money that they can spare for the effort. They'll find better things to spend it on (new tech, I bet).
And yes, I do now that the stated reason for the buyback was "neutralizing the impact of dilution from future employee equity grants and employee stock purchase programs." I'm not sure that's the reason - not unless Apple is worried about employees cashing out right away.