WR snaps from Dallas games:
Out of 70
64 Nelson (1st year after ACL)
53 Cobb (playing injured)
31 Adams (concussed)
32 Janis (route-challenged)
13 Montgomery (plus 22 at RB)
12 Davis (rookie)
4 Abby (injured)
I don't remember when Abby got injured, but it appears as if there's a clear hierarchy of snaps among the WRs.