I have only sent less than 10-15 pm's and have had to split them on 3 occasions. One of my reasons was a tutorial for someone to pre-view or comment on before I was finished. The other was me typing a novel to an old friends cuz I'm a blow-hard, and the other was the exageration i add to any story I tell
Not complaining or saying either way is best for member and board, just an FYI that others do experience the same and do send longer than 3k pm's too.