But, does the introduction of this feature prove that to be false or make it no longer true? It would appear that Google is citing X service as justification for including it in the local pack results for that search query. Thoughts?
Those are pulled from the "services " section.
Google is testing adding "services" labels in maps & local results - much like those added in for website mentions, posts, and reviews. These labels are called "justifications" by Google. Here's what we're seeing:localu.org