WP7609 Current Draw on Low Power Mode?

I’ve changed a few things and it behaves more as expected.
A new thing I’m seeing is that I can enter low power (idle) mode now using the sample smsApp and voiceCallApp. On receiving a registered event, like an SMS or call, the current goes back to an active current of around 42mA, before taking about a minute of inactivity to return back to idle mode.

I’d like to return to idle as soon as possible. Is this minute time period configurable?