Can you recall a few of those reviews?
If you're referring to the few in this thread...
AIR all were pretty-much watered-down in the end, as nothing to worry about.

The only direct hands on w/a N9 in this thread (undoubtedly w/beta fw) was from 1x person.
And he conceded it was fine overall as far as VKB's go, just didn't have long with it etc.

But you make a fair point...
There may be many other areas that are really crappy, that we don't know anything about yet.
Time will tell I guess....