My first was 14 months, my second was 9 months, and my 3rd is currently 13 months and still wakes almost hourly every night. He has "slept" (not through, but slept for a decent amount of the night) twice.
He sleeps in a queen size bed in his own room, because a cot just didn't work for him at all, he wouldn't even contemplate sleeping in it. Most nights I put him down in his bed at around 7:30, and will usually join him in there from about midnight onwards. It's the only way I get any sleep.