You'll see the value he brings when he doesn't have a supporting cast. In the current state of the Broncos, the standard for Tebow will naturally be Elway. John Elway repeatedly brought the Broncos to the superbowl in years when there were no other players much better than average on the team. He couldn't win a super bowl all by himself, for those he had to have a good team around him, but the early years he picked up the team and carried them. For a Bronco fan, that is the standard, fair or not.
John Elway’s rookie stats
7 TDS 14 INTS Quarterback Rating 54.9%