is age really that important?
I believe it's more about dedication and passion. When you love to play, and you spend enough time with your guitar on your lap, you can do some great stuff even after a few months.
I'm 24 now, and I've been playing only for three months now. I guess I started playing very late, but that absolutely doesn't hold me back. I believe that if i keep practicing every day, i will be able to do some great stuff within a year or so.