That would be wrong. Marz was one of the first to go that size. Fox, if you consider it a purely trail/xc fork, was the first in that genre. But the z series (and don't forget the monster haha) was the first to mass market the idea and several indies did it before that.

Ahhh caught the caveat about "all"...ok, the above could be wrong, I don't know...I guess the thing to keep in mind, fox is also one of the only manufacturers, that early on, to mass produce a very small "range" of forks trying to fill a big range of riders. The lowest common denominator would fit. Rock shox and marz have a full range of forks in each "area" of riding. At least thats kind of how I look at it.