I didn't read it, but would bet my last dollar that one is gonna make less noise for less time climbing with less flap. For the purpose of this argument though, who gives a fcuk about the noise when you are climbing out on one engine? Noise will be the last thing on my mind, so could we get back to the topic in hand?
Seems to me that nobody has come up with a good argument to disprove Tommie's theory.... yet. It's all very well stating that it's not possible to define precisely the gradient he might make using early flap retraction, but if it is the case that the gradient will be better is that not enough to make his case?