Prairie State Blue: Kane's Early Primary Numbers - Are Dems abstaining from Special?

A good post by Jordal over at Prairie State Blue: Kane's Early Primary Numbers - Are Dems abstaining from Special? Looks like the proprotion of Democratic and Republican ballots in the Congressional Primary are even, and then a disproportionate share of voters pull GOP ballots in the special.

Why are 12% of early-voting Democrats not voting in the Special Primary? Are they waiting until Feb 5th? (Is it even possible to wait?) Whether or not it’s intentional on the part of voters, it seems reasonable to state that the closer the race is, the more likely it is that Democrats will wind up with two different nominees for March and November, and given that these discrepancies disproportionately affect the Democratic Primary, there should be special attention paid amongst Kane County Democrats.

I'm guessing it's Democrats crossying over to vote against Oberweis after having cast a ballot for Obama.