This is more a curiousity about other people's experiences with their kids, but one thing I noticed with my DD when she was younger and reading, more before she started K up into a bit of 2nd grade, is that it didn't matter what the font was or whether it was cursive, upside down, sideways...she could still read it. Actually until a while into 2nd grade she seemed to prefer reading with the book upside down but then seemed to give into the correction at school and brought it home with her.
The vision therapist we took her too thought it was because she wasn't really seeing words as a string of letters making sounds and meaning when put together, but as a chunk and she was able recognize the chunk in a variety of formats...more like art...?