sorry, but I do not see the point. Why wait for the hand signal before doing the checklist???? You do the checklist (you are not moving and the park brake is set) then, AFTER you receive the hand signal you request taxi.
I do not see any benefit whatsoever to wait for the hand signal before performing the after start checklist...
Aren't we making simple things too difficult? It's like in my Orange outfit where even trainers in their briefing at LGW they say Traffic and Radio congestion is a threat! I mean, what the hell.