I think this observation reads true to some extent. The catch is that throughout the history of scent traditionally "male fragrances" have always had floral notes as important components. It's just that they weren't much talked about. It's likely that most oriental scents for men have significant proportions of rose and/or jasmine notes at their heart. Ylang-ylang and carnation have long been quite common in men's scents as well. Meanwhile, even such a determinedly "masculine" scent as Knize Ten features a prominent note of plum, and all of those traditional Eau de Colognes are fundamentally fruit scents.
For marketing purposes the floral notes have been underplayed (at least during the 20th century), but I think you're correct to point out that as gender boundaries break down, floral notes in men's scents have been "coming out of the closet." Masculine rose scents in particular seem to be enjoying some attention these days. Even so, there are still very few overtly/primarily floral scents for men on the market.