For more anecdotal data, I have a NIB catwoman edition and I get a bat phone magnet grab maybe 1 in 5. As a new owner, I thought something was wrong with my game and was searching for fixes. Oh well.
Oh and for posterity, the menu location to turn down the slingshot coil power is adj -> game -> #271. That took me a while to find and has cut down the right slingshot to left outlane insta-death.