We had some problems right around 2 1/2, but it's normal for my son to be a little slow on stuff, even sleep regressions. I actually didn't even think about it until I read your post. This made me feel better. He started taking forEVER to go to sleep, he would sit in his bed and talk and play for hours. Then he would wake up 2 or 3 times at night, always crying and needing to be rocked or patted. Then he was up for the day at 5 or 6, with a nap only about half of the time.
I don't know what to tell you, other than it passed on its own. We didn't do any kind of sleep training or anything. I might have whined a lot about being tired, but for the most part we just toughed it out and gave him what he needed. We can't let him CIO anyway because he shares a room with his brother. Now he's back to normal, and actually I think sleeping even better than before. Maybe we've finally hit that toddler sleep I keep hearing is so awesome.