Regardless of what O2 says - I think video card performance is always based on triangles - and I always give poly counts based on # of triangles, not 02's numbers. 3dsmax does the same thing - they call it a 'poly count' but it's really a triangle count.
If someone can correct me, that would be great! Then I could tell you that my weapon poly counts are much lower...
Yes, graphic card performance is measured in number of drawn triangles/second, but they do state that it is triangles.
I.E they don't say "We can draw X million polygons per second" they say "We can draw X million triangles per second".
Most of the time, in both games and 3D applications, a triangle is the smallest piece available (some can have a single dot/vertice/vertex/point as well) and then there's the square polygon, which is made up out of two triangles.
As it's really diverse, there's no "one way" of doing it.
My personal recommendation however is always look at the largest number, I.E the triangles, and then you won't have to redo the whole thing due to high polycount.