During the power outage CRC errors were nil, though admittedly I didn't sit around longer than 20 minutes waiting for some.

SNRM dropped to 0 quickly once power was restored, but it hung onto the sync until just before 5am (not the usual DLM demotion time) and then resynced at the normal rate.
With functional mains power, it's around 0.15CRCPM on DLM-4. We seem to alternate between DLM-4 and DLM-2 on a fairly regular basis. DLM-2's CRC rate is quite a bit higher, starting around 3CRCPM, rising to 20CRCPM or so over a few days. No resyncs normally other than the 04:11 DLM-initiated syncs.
I thought it was kind of neat to see what the line could do with minimal interference from other lines and electric fences (rural area). 430m line length, give or take. 200m underground along the road, and then another 230m underground along our boundary line and under the house.
Though, I think I'll take having mains power over the improved sync any day :)