The result has been an explosion of offensive capability. To be sure, the Giants were fortunate to be playing a developing team in the Houston Texans on Sunday and a Redskins team depleted by injuries. But there was a precision and a meticulousness to the offensive attack on Thursday that was impossible to ignore.

Two weeks ago, McAdoo was being badgered with questions about whether Manning would ever adapt to the West Coast-style offense. In the last two games, Manning has completed 49 of 67 passes (73.1 percent) for 534 yards, six touchdowns and one interception — a miscue that was not his fault because the football was knocked from the grasp of a receiver.

“Eli has had time to recognize his keys and go through his progressions,” Coach Tom Coughlin said Friday. “And when that happens, he is very accurate in terms of his over-the-shoulder throws and back-shoulder throws.

“There isn’t any doubt he’s growing in the system and understanding how it can be utilized.”

The introduction of a new offense begins with learning the new language of the plays, then the plays themselves, then the dozens of variations of each play and finally all the alternatives of each play based on the opposing defense, which also might change seconds before the snap and require another on-the-fly adjustment.

The Giants were acclimating to all that while also welcoming six new offensive starters.

“There were a lot of new things going on — new plays, new cadence, new people,” Manning said. “It was going to take some a while to get totally comfortable. But we’ve gotten better every week.”

Manning’s new go-to receiver, especially on third downs and near the goal line, has been Donnell, an undrafted free agent from Grambling State who made one start last season.

Manning conceded Thursday night that Donnell had probably exceeded his expectations.

“Yeah, probably so, I think he just hadn’t had a whole lot of game action,” Manning said. “I was hoping he could play at this level. He’s done a good job understanding the timing of routes and made some tough catches.”