It was either last year or the year before that Favre was back to his old (younger) self, putting up huge numbers. Kerry Collins has only been throwing the ball 15 times, against defenses playing against the run. Need i remind you of his days as a Giant? You want to talk about inconsistant and interception, then talk about Collins as a Giant.
Eli is still pretty young in the league. He also has a very famous brother that people expect him to play up to. Thats some mighty fine pressure right that. Not to mention he plays in New York, not Tennessee, where the media is much much more brutal and expectations are much much higher. Eli played his best when it counted the most last year, which is why they won 10 road games in a row including the superbowl.
The Pack were never trying to push him to the door. Once he retired, they gave the go ahead to Rodgers, and would not take a step back and bring Favre back when he un-retired. They know he's only good for one or two more years in the league, and for them (the Pack) it doesn't do them any good to hold back the 'future' of the franchise anymore.