I don't have proof but as some one with it. I have noticed that sometimes. Not very often. But when someone is fronting long enough it changes. I don't understand how or why. And understand this is my system own experiences not every system.

I believe it might be because we have somewhat our own body chemistry. For instance foods taste different depending on who's fronting.

I don't know if this is true. It I remember hearing that some alters can have full blindness and other things based on who's fronting.

Or course the research on D.i.d. system are not very much sadly.