I think most unbiased followers of college football would see that as a reasonable spread for the following reasons -
1) Home field is worth roughly 3 points. That means if this game were played at Bobby Dodd we'd be roughly 14 pt favorites.
2) GT/Duke was a close game last year, one where Ray Beno arguably swayed momentum in our favor in the 3rd quarter (i.e., can't bank on that)
3) GT was a 7-7 team last year and hasn't played anyone yet
Most on this board would probably agree that we expect to cover the spread based on expectations of an improved offense and defense this year. I hope opinions are not based on actual results from a game vs. Elon.