Prestidigitalis
First Post
I believe you are confusing your group's culture ("general recommendation") with the game's rules.
The "group" to which I refer comprises several groups and also the vast horde of commentors in the year-long threads about grind. And while I say this based on my memory of events and not from a specific reference, I believe a number of the creators of 4e have recommended rolling attack and damage at the same time. I don't think they would have done so if it would constitute a violation of the rules.
However, the string of inferences required to support my earlier formulation of an answer to the OP's question is longer and shakier than the ideal, so I withdraw it.