This IS PPP and its very early on, PPP always overestimates democrats in polls when its not at least a half year away.
This is a bad talking point that needs to stop. I was hoping only Oldies bought into this stuff.
But it's true. I remember last summer, most of the polls had Obama leading Romney by only a few points like states in Colorado and Virginia, but PPP had him leading there by almost double digits. And besides, what makes you think that a Democratic pollster wouldn't have results that are biased toward Democrats? They may be accurate just before an election, but their early campaign polling is awful.
I also remember the Sanford/Colbert Busch race where PPP had Busch up 9-5 points weeks before the election, than a few days before the election they changed it to Sanford + 1, and even then Sanford won by 9 (!)
They didn't "change it" they did a poll. The momentum was clearly on Sanford's side toward the end. Besides, it's a special election, turnout is very volatile. Changes can happen quickly in those circumstances. I feel like you are pretending not to understand nuances of special elections in order to prove yourself right.
Besides, every other pollster had those numbers about the same.