tedster - 5:13 pm on Apr 18, 2013 (gmt 0)
I don't believe -950 was ever considered manual.
I think you're right on that score. Seeing an "end of results" drop (or -950) is basically a scoring method and not necessarily one that always has the same cause. That said, my experience in the past was the same as netmeg's - diversifying internal anchor text repetition made the difference.