While I'd like to agree with you as I think North are pretenders who are weak mentally, losing to the two clear best sides in the comp by a combined total of 7 points means a lot more than anything West Coast has done this season.
I'm not sure how you go about assessing form, but I tend to look at how a side has gone against other sides....even if they lost honourably.
Yet another mentally weak honourable loss for North.