My little sister had a gap in her baby teeth, and also a gap in her adult teeth, until they all came through, and now it's closed and she has perfect teeth!. She also had a lisp but out grew it.

I didn't have a gap and my teeth ended up overcrowded and needed some removed and braces.

I think having a gap would probably be a good thing as it might leave a little extra room.....but don't quote me!