Look at the opportunity cost then make a decision. If I were in your shoes... if I'm making more than $90k AND =<25, then I wouldn't go for a degree. However, education never hurts right?
tl;dr: CS teaches you how to be a better problem solver. You probably know more about "programming" and "languages" than most CS majors.
I have been talking to a close friend of mine who attended UCLAN and with the exception of some of the more complicated algebra and (quite a lot of) the compiler unit, I have the majority of the first and second years covered already, but the problem really is the piece of people to prove this, will the Googles and the Microsofts of this world even consider my application with the absence of a degree on there?
As I mentioned in my other post, you'll get more value out of a degree if you study something else _in addition to_ computer science. If you're in CS courses and you feel like it's easy (The more introductory courses will be very easy; you may be able to test out) it'll feel like a waste of time. It is up to you what kind of value you want to get out of it.
I agree about not needing the degree to do well, I would however propose that from stories I have heard so far it does seem to reduce the difficulty.
However, there's plenty of people with a CS degree I'd never consider working with and if a company was to hire me based solely on my CS degree I wouldn't consider working for them. There's more to any single developer than a degree they hold, or don't.