I sympathize. I remember when I was first applying for tech jobs I was often given a mac (which I was unfamiliar with) set in Qwerty (I used Dvorak) and told "just write this."

Even asking them to change it to Dvorak for me (since I wasn't familiar with the menus) I could tell they were judging me. Once I bit the the bullet and learned the mac interface suddenly people were assuming I was super hardcore because I use Dvorak.... Stereotypes cut both ways I guess.