If this is the case, most of the gobblers I have killed are much older than I have given them credit for. 

I always thought that a bird with 1 inch spurs would be a 2 year old. 

Of the mature gobblers I have killed, which isn't that many (6 I think), 1 inch spurs are the smallest of the bunch.

The bird I killed on Saturday had spurs right at one inch.  I guessed him to be 2 years old, due to his spurs, and the way he responded immedietely to my call and came in fast. 

I guess I'm not much good at aging turkeys.  I am great at eating them though!