The Verge review didn't come off as biased to me. They seemed to echo sentiments about the tab I'm reading from other sites. It's nice without feeling like a super high-end premium device. The screen is good, but not outstanding, the speakers aren't as good as The HTC One M8 speakers etc.
Didn't read as biased to me, seem like fair criticisms of the device. And they make a fair point, it's priced similar to the iPad, so for the general consumer which device would they get a better experience out of? I don't think there's bias by suggesting maybe they're better off with an iPad Air 2. What would be biased is if they still recommended the Nexus 9 despite it having an inferior build, inferior screen, software, tablet apps etc than the iPad Air 2. That would be unfair.
Just my take on it.