When you lose by double digits, it's never the result of a single play, momentum or otherwise. Two weeks into the season, the Saints are playing MUCH better than the Eagles. Since it's early, that could change, but you have nothing to base your claim that the Eagles are that much better than the Saints, other than being from Philly and having previously admitted to having a small dick on the internet. (unrelated premise but worth noting)
Try this. The Giants are known to have a strong defense and running game, and are generally perceived by current football media experts to be the #1 team in the NFC East. While they've put up good numbers in the passing game, going against preseason concerns of a perceived weakness, their running game looked subpar against the Cowboys, as did their run defense, two points of pride from years past. Also, injuries to a young but talented secondary could be long term concerns, although they haven't proven to be against the Redskins or Cowboys. Looking long term, I have reason to believe these issues can be fixed due to a strong, disciplined approach by the coaching staff, and a series of weaker opponents over the next few weeks that will allow the Giants to work out some of the problems they've been having so far. This will also give Manning time to build chemistry with Steve Smith and Mario Manningham, who have played well through the first two games.
See what I did there? Probably not, but it's worth a shot.
