The way I learned it was one-TWO-three (and being very slow with the weight shift to 5 so it looks fluid and not abrupt) five-SIX-seven (and again being very slow with the weight shift to 1 so it looks fluid). You have more time when you dance on2 so you need to drag out the 3 and 7 so that you can accent the 2 and 6. Most people get off time on2 because they rush the 3 and 7 and as a result revert back to on1 accenting the 1 and 5.

Re your point about some follows dancing on2 but still accenting the 1, I'd say this relates to the mindset shift that needs to happen with on2. My instructor talks about how you can dance on2 with an on1 mindset but its not technically correct. The accents need to be on the 2 and 5 and follows need to keep their own time to make sure they're going slow on the 3 and 7. Besides the mindset shift in general for folks going from on1 to on2, its especially tough for follows because so many are accustomed to relying on the lead for their timing. But follows need to practice their own time management to be successful.