On the subject of Cordarrelle Patterson, a #29 pick in 2013, the guy scored an 11 on the Wonderlic, about on par with the average random answer score of 10.
Some bonus info: Tavon Austin, the #8 also in 2013, scored a 7. Justin Hunter, the #34 in that same draft, scored a 12.
All three have had underwhelming production in their first 2 years. Patterson and Austin saw their numbers go down from their rookie seasons.
Whether it's a matter of cognitive ability or functional illiteracy, these kinds of scores raise serious questions as to whether these players can read and comprehend an NFL playbook.
Thompson avoids these kinds of guys, to his credit. One notable exception comes to mind in the form of the Vince Young emergency move.
The average NFL player scores a 20, in line with the general population. The current Packer draft class scored at or above the NFL average for their position group. (I don't see any data for D-linemen from two different sources, but it's likely 19 or lower):
Randall - 18
Rollins - 19
Montgomery - 24
Ryan - 22
Hundley - 26 (at the low end of the range where successful QBs are clustered; Favre was an outlier at 22; the NFL average is 24).
Ripkowski - 31
Ringo - 19
Backman - 22