We've chicken-gybed even while racing when conditions warrant.. and it's not always a dead-simple manoeuvre either... It's best to trim the sails throughout the 'harden-up and tack and falling off' lest the boat slow enough to settle into irons.
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)
1984 Fast/Nicholson 345 "FastForward"