I meant their polls were off the last two election cycles. Just check their twitter feed if you don't think they're an advocacy group
I think comparing exit polls to pre-election polls is pretty unreliable. Regardless, in 2012 their final survey showed 73-25 Obama, when exit polls showed 71-27. Either their poll was wrong or the exit polls were. It's not a huge miss in the grand scheme of things and was probably much more accurate than the major national polls at the time.
And lol, I know, they hate Trump a lot, but that's not particularly surprising or indicative of the accuracy of their polls.