Mate, I'm almost at the 2 year mark and I am only just beginning to have the hair creep up on my cheeks. It's still thin, but getting thicker. My neckbeard is massively bushy if I don't trim it, but like you it's just slow-going elsewhere. Give it time - I've heard that it can take about 5 years on T to get a full-ish decent beard and sideburns.