i had a quick look at the article. overseas stuff i tend to ignore because its not comparable to what our conditions are here. its very easy to be clouded by crap that doesn't matter.
however a simply take away is, if you set up your hives properly before winter then there is no need to feed mid winter.
i remember a young beekeeper asked me at bee conference about what feeding we do over winter, and was rather shocked when i said we don't do any.