This article is about sleeping, rather than aging (although the idea is that poor sleep will age you).
Anyway, seems to me like a filler page designed to push a site up google or get more organic search hits.
You can read it like this 'moving either jaw back sometimes decreases the airway which might lead to poorer sleep which might lead to aging"
If you're type 3, you've got an overdeveloped mandible and therefore might have a larger than average airway to go with it. In which case moving it back won't be a problem
Everyone I've seen who's had their maxilla moved back, has had their mandible moved forward...should cancel out airway changes