big jessica, my white orpington, takes about 1/2 an hour to lay her egg.
this doesn't include all the noisy trips to the nesting box before hand,
usually about two false starts. she yells for everyone to hear before
every trip to the box.
she sits in there and scuffs and kicks and rearranges the wood shavings.
and then low and behold one medium egg, 1/2 an hour later.