It's been Eastern count and Western count as far back as I can remember reading Field&Stream, Outdoor Life and Sports Afield--and that's a bunch of decades.
So, Eastern count, you count all legal tines. Western count is 4x4 or 3x5 or whatever, and I plead ignorance about the brow-tine thing.
You're from BATFE? Come right in! I use all your fine products!