Once while I was LDing I was talking to someone, and told him we didn't have much time left. I explained we were dreaming and I would be waking up soon. I somehow knew when i'd be waking up. To my knowledge I did not wake myself up (which I can do so I know what to do and how it feels etc), I just knew when i'd begin waking up.

So, not sure if this answers the posters initial question or not... but i'd say the answer would be yes.

I've not done it again to my knowledge however. But I find judging time a very cold, harsh and strict thing I don't like to do. (I don't even wear a watch). When I don't have to be doing something, I prefer to just let time slip on unchecked. perhaps I knew when i'd be waking in the mentioned story there, because I was doing something important and didn't want to run out of time doing what I was doing heh who knows.

all just subjective.