Again I'm going to disagree. The large formations of multiple bomber pilots are easy pickings if they run at or close to full throttle. Their spacing easily opens up, god forbid they need to attempt a turn, and they generally have to worry more about placement as opposed to gunning.
I've flown bombers with formations in multiple scenarios and FSO's. We often will be found with our throttles back to cruise.
It is more of an issue with me in the MAs where it is often a single formation of unescorted bombers with the throttle firewalled. If they start a shallow dive good luck getting many passes on them.
You must not have flown in the Battle of Britain scenario then.
We got one swipe in our Spit I's at the Ju88's prior to being left in the dust. Even when we were able to get alt and come down fast, we usually didnt get a second chance because the Ju88's were truckin'. As Krusty pointed out, in Bougainville the B24's will be able to almsot match or outrun all but the "Franks".
Historically, bombers cruised at under 200mph for bombing runs. While there are obviously exceptions to the rule, the overwhelming majority of bomber formations in AH2, scenario or MA, run at 90+% throttle during bombing runs.