I really have also noticed more variation in people. But I've also come to see that it doesn't really matter, and that we all make assumptions. A week or so ago I saw a woman on the bus, and I thought "oh, she's pretty." Then I noticed she had large hands and was a bit taller. I thought "oh, I wonder if she's also trans" (not that it would have mattered, I just got curious). Then I realized, "who cares? She's a pretty girl and she's just riding the bus, why do I need to know?"