Re-reading the thread for the last few posts I think the conversation has moved from Fast-Track security to Fast-Track immigration.
Anyway this is my update at LHR for security. There are no signs on the Fast-Track security lane for SkyTeam Elite members but I chanced it anyway on Monday morning. My BP failed the check (Econ) by the gatekeeper but I said I was SkyTeam Platinum and he pressed an override button on the screen and let me through. I still can't find anything that says this is a benefit on-line. Did anyone find anything?