I truly, truly believe they would not have.
Perhaps Tiki would have started factioning and fractioning the room after the first two loses when the early grumblings already started in NY.
Perhaps he would have waited until on of Eli and the teams inconsistent stretches and leak something out to the media.
Perhaps Tiki's presence would have resulted in Coughlin not feeling comfortable trying to treat his full team more like adults while also having some fun to their routine.
Now, had Bradshaw not burst on the scene late in the year, I don't think the Giants would have had enough to overcome the loss of Tiki's HoF talent on the field. However, with Bradshaw, I think while Tiki would still bring something more to the table, it wouldnot be aneough to overcome his repeated negative presence in the locker room (from everything I've read, heard, all that. I know im not actually in the room).