Yes, and no. When I am typing to either a client or person who I know through business contacts, I type in a way that makes me look as mature and professional as possible. I've been doing this since roughly age 11 -not to say I had a business back then. I'm also 16 years old.
When I talk to people that I know personally, I usually instinctively stop writing in this manner and begin to cut words, spell in shortcuts, and use acronyms.