The ex racer who owns the bike store I frequent does the whole "pull up" thing to train, says his russian coach had them do that. I felt like my pedal stroke was NOT smooth at all once I hit my max cadence (probably above 130) and ended up pulling something in my groin so maybe even if foot retention isn't needed or doesn't give me extra watts, it could teach me how to pedal smoothly. Maybe put some foot retention on my 42x18 single speed and turn it into a fixie and bomb some hills. Thats one way to force high cadence.
The girl asked if I have time to go to their house this afternoon, says she has something for me and wants to see my bike. Maybe its an old pair of his cleats. If its a jersey imma be salty