Folks, I am just the messenger here! Found this discussion on MeFi that I had to share. Check out the deaf blogs and you see many write well. However, I did have a couple of pen pals when I was a child and they wrote in ASL-speak. For the most part, it was easy to understand what they were saying. There was one whose writing was very hard to translate.
Just like in America — you have some people who write well and others who can’t read more than a few words in English. You’ll find deaf people who write perfect English, ASL-English and hard-to-understand English. It isn’t just a deaf thing — more like an ESL and education thing.
One thing is true — sign language has its own accents. For instance, ASL and British (UK) sign language are not and do not look the same even to a person who doesn’t know much sign language. Four Weddings and a Funeral has a deaf character who does British sign language. It’s a great movie and fascinating to watch him sign.