So, this NFL season will be very different without Peyton on the field. I have to admit that if the neck surgeries are going to keep him indefintely..then yes; it is time to walk away from the game, while he still can.
A very good article about Manning and how he should walk away from the game now while he still can.
I would rather see Manning walk away after having surgery, rather then try to come back and play the game and get himself injured (and taken off the field on a stretcher)...
http://aol.sportingnews.com/nfl/story/2011-09-11/it-wont-be-storybook-end-but-peyton-manning-should-retire?icid=maing-grid7|main5|dl14|sec1_lnk3|94954