Honestly, I think some people would think something was off, but mostly because they're not entirely 'normal' looking. I feel like a twat saying that, but hear me out. I don't think the first thought would be "those are a females breasts!", especially considering your body shape.
I've seen guys with a chest like that, but not with the (might I mention impressive, good job dude) muscle structure you have going. I mean, cis men have breast reductions and nipple reconstruction. So I guess am drawn to the nipples because they're not what I expect.
Again, looking at this pic as though you're a cis guy, I immediately think of men who have breast/nipple growth more than is considered 'the norm' and such, not of a ftm. I don't think it'd come up as my first thought, even being a ftm. We're not on most peoples minds.