From what I've seen, yeah. Most of those are bitmaps with only the upper left and lower right corner of the bitmap being tagged with lat/long (so they can put your cursor on the bitmap from the GPS data).

My personal opinion is:
- I don't care whether the maps are bitmap or vector.
- I don't care whether I'm displaying pre-computed directions downloaded from a website, or if the directions are computed realtime on the unit.
- I don't care whether there is "live" street data that I can see on the screen for when I go off-route.
- All I care about is whether it gives me ACCURATE directions from point A to point B as I'm doing the journey.