At least they are willing to release ALL internals of their tracking poll, unlike the major pollsters.
I actually do congratulate DailyKos for what they are doing.
My point however is that given the nature of their site, regardless of whom they select as their pollster there will be charges of bias.
Picking a firm with a slight democratic bias, and a principle pollster with long ties to the Democratic party does not help this perception.
Pollsters make a profit on polls.
They probably preferred to let that profit go to a friend of theirs.