all this based on opening day rosters:
Redskins - 26.7 (with 4.8 years NFL experience - 7 rookies, 7 players age 30 or over)
Giants - 26.3 (with 4.3 years NFL experience - 11 rookies, with 11 players 30 or over)
Eagles - 26.3 (with 4.0 years NFL experience - 14 rookies, 7 players age 30 or over)
Cowpukes - 25.8 (with 3.7 years NFL experience - 13 rookies, 6 players age 30 or over)
Dallas was the division's hefiest team, averaging 245 pounds. They had eight avging 315.2 pounds per man, fifth in the league. Currently they have 10, eight are o-lineman, two d-tackles.
This suprised me that the Skins are the oldest and most experienced (by average) team in the division.