I have to say there is quite a bit of compelling evidence to support this theory.
Consider the word "temperate" as an example. This word shows up 7 times in all of the standard works, and only twice in the entire Book of Mormon.
Once in Alma's words to the people of Gideon:
23 And now I would that ye should be humble, and be submissive and gentle; easy to be entreated; full of patience and long-suffering; being temperate in all things; being diligent in keeping the commandments of God at all times; asking for whatsoever things ye stand in need, both spiritual and temporal; always returning thanks unto God for whatsoever things ye do receive. (Alma 7)
...and once in his words to his son Shiblon:
10 And now, as ye have begun to teach the word even so I would that ye should continue to teach; and I would that ye would be diligent and temperate in all things. (Alma 38)
This, to me, is either a remarkable coincidence or an indication of a pattern.