Here are a couple of my introductions that are clearly 100% evergreen (and yes, they are hardy in the north) and were registered that way (pictures taken today). The first one is Gnashing of Teeth and the second one is Faith That Moves Mountains. Note that the foliage is erect and there is virtually no yellowing or browning at all.
The picture below is Entwined in the Vine. Although in the greenhouse it does not look evergreen this year (note the slumping leaves and browning foliage), I registered it that way because I thought it looked that way in the year before registration and because outside in the spring its foliage is mushy.
The next picture is All Things to All Men, which is a semi-evergreen. Note yellowing but lots of green, and it looks like it might be about 70% evergreen and 30% dormant if you were using a sliding scale.
This is Spoken in Parables, which looks about midway between dormant and evergreen, and is registered as a semi-evergreen.
The picture below is Wrestling with Angels, which is almost dormant (about 90%) but not quite, so I had to register it as a semi-evergreen. Most plants this dormant do not do well in the greenhouse, so the majority of the fans are lined out outside.
Finally, a picture of Fear Not, a dormant inside and out that is now completely underground.