Is this because I've been using Power Grips (on track pedals) for the last few months, or something?
Quite possibly, the motion of inserting your feet at an angle into the Power Grips and twisting it to secure it is not too dissimilar to riding with clipless pedals.
Quite possibly, the motion of inserting your feet at an angle into the Power Grips and twisting it to secure it is not too dissimilar to riding with clipless pedals.