No.
This feature is called "Resume Dim" and functionally is built in the controller chip, in the switch. It can not be modified or disabled. "SoftStart" is also built in the chip and is the slow ramping up or down when turned ON or OFF.
However these features were "an upgrade" to the switch in (I believe) early 2008. Pre 2008 switches were instant ON and OFF, did not have "Resume Dim", nor local dimming ability, at the switch. You might find someone on the forum that would be willing to trade you an older switch or two. I will check in my "stash" if you are interested.
Also check Smarthome.com. I believe the ICON switch does have a slightly faster version of "SoftStart" without the "Resume Dim" feature. PCS used to make X10 switches which had similar features, but they could disabled through programming. Google PCS(?).