Joined: Aug 2008
Posts: 13,141
Likes: 2,165
From: Ann Arbor, MI
Bikes: 15 Kinesis Racelight 4S, 76 Motebecane Gran Jubilée, 17 Dedacciai Gladiatore2, 12 Breezer Venturi, 09 Dahon Mariner, 12 Mercier Nano, 95 DeKerf Team SL, 19 Tern Rally, 21 Breezer Doppler Cafe+, 19 T-Lab X3, 91 Serotta CII, 23 3T Strada
I can't speak to the science/biomechanic issues, so all I can say is that float feels weird to me, and I've never adapted to it in 20yrs of repeated attempts. I still ride 0° cleats (Mavic) and single release SPD clamped down tightly (though they do still float somewhat, I don't notice often; I use with MTB shoes for winter/spring rides, so maybe outsole helps 'em stay put).
As has been suggested, I do spend some effort to get cleats set properly. I've gotten good over the years, but it's not slap n go.