I can only speak for myself, naturally, but when I talk about a low magic system, I also mean something that has low "magical" abilities. If something does the same thing as magic but is just called an ability, it makes no difference to me. It's still magic, just by a different name. So while technically 4e has a lot of non-magical stuff, it still feels to me like every class has magic (or superpowers if you want to call it).
When I talk about low magic, I'm thinking of more like WFRP1e, or even the aforementioned AiME for 5e.