My experince on airbus planes is about 0 minutes. The rest is on boeing A/C. What interests me is the way an airbus reacts to not inserting the V-speeds. Apparently you get no more that MCT thrust when you advance. How much is this MCT, in terms of % N1 ?
On a boeing aircraft, as long as the flaps are set, and you advance thrust levers to 100%, you will be able to fly. Pressing TOGA is not strictly necessary, i.e. It won't hinder the airplane from taking off....