I looked. It doesn't. I found both the BIOS (F2 on startup) and the control panel that sets BIOS options and neither one has the option I'm looking for. It seems like this should definitely be a BIOS/ACPI option (as Windows isn't running when the action occurs), so I think looking for it in Windows is probably the wrong thing.

I've sent Sony a support email. I imagine that if I get a response, though, it'll say something along the lines of "tough cookies, loser".