[ACE-OF-ACES]

I agree there, but this isn't an extended climb to 30kft, its an extended climb to 10,000ft from 1500 ft. In the context of this test the climb angle doesn't change much.

Well one mans small is another mans big

The only point I am making here is that it was not constant

And that pilots were very use to adjusting the climb angle to obtain the best climb speed as they climbed

Thus I would expect they would changed the climb angle during the zoom to obtain the best time to climb