Yep. Typically has been. And, as you noted, the Bison fans that vote typically don't hold UND down because it's UND. They're fairly free of bias. I think what sinks UND (and Idaho St) are the east coast voters, as some of these polls just don't make any sense to me at all.
Anyway, here is the thread discussing this weeks polls. A lot of defending UND and Idaho State in this one. Definitely a good read.
http://www.anygivensaturday.com/showthread.php?215312-AGS-Poll-Results-WEEK-7-POLL-2018-SEASON