You should say "other operating systems" maybe, not "other browsers". On OS X, Firefox, Safari, and Chrome all defer to the system as to whether to default to subpixel antialiasing. I wouldn't be surprised if Windows 8's metro version of IE did the same. And Firefox ignores -webkit-font-smoothing:antialiased, so you still can't claim consistency.
And if you're trying to be pixel perfect to Photoshop, why aren't you using PNG? Anything else isn't going to work, after all.
But if you're only arguing for white on black, well I guess. But you don't point this out, and white on black is horrid for text anyway.