I used Fast Track at T5 at around 3.45 last Tue as well, and whizzed through in a couple of minutes. Only delay was me removing laptop/liquids, and replacing them. Thinks: why no tables to do this like LCY? That would help to.
F3G - I had 2 bags plus laptop/coat/liquids, and although I attempted to use 4 trays, the chap combined all my stuff into 2. Maybe they read what we wrote I while back and acted on it??