Getting drafted high for a FCS quarterback is a tall task.
In the last 10 NFL drafts, 12 FCS quarterbacks and 1 Division II quarterback have been drafted.
Only three of those have been in the first four rounds:
1st Round - 2008 - Joe Flacco Delaware - Pitt transfer
2nd round - 2006 - Tavaris Jackson - Alabama A&M
3rd round - 2010 - Armanti Edwards - Appalachian State - drafted as a wide receiver.
4th round - None
Each of these guys drafted higher than the fifth round exhausted their college eligibility. Flacco and Jackson were fifth year seniors when drafted.
Only 1 FCS quarterback was drafted this year - Coleman from Chattanooga went in the 7th round. No FCS quarterbacks were drafted in 2011.
For Hess as a FCS quarterback to come out with eligibility remaining and be drafted in the second or third round would be something not done in the last decade.
In fact, prior to 2003 the only other FCS quarterbacks drafted in the first three rounds since Steve McNair went in the first round in 1995 were Josh McCown (3rd round - 2002) and Giovanni Carmazzi (3rd round - 2000).
http://www.nfl.com/draft/history/fulldraft?type=position