... whereas we (757) start the flap retraction at 1000'agl, which is way too soon to start talking to anyone. (This is why at places where the silent handover is supposed to occur immediately after take-off eg EBBR, EHAM, EDDF etc. we don't normally check in until FLAP UP has been selected).
Just goes to show there is more than one way to skin a cat!!
(No animals were harmed in the writing of this post)
G W-H