I'm exclusively lesbian, and I used to say I was pre-everything, but in the last few months I've had a couple of laser sessions, hair has grown long enough, and I've started wearing women's jeans and leggings in public. Face and overall presentation is still male though.
Despite that, I can see that I am getting more looks than usual, mostly because from a distance or from behind, people may get confused. They look away as soon as I look back at them, though. Not sure if that counts as being checked out, but I guess I'll be creeped out if it happens with me.