Hi! Welcome from TX!
I am mom to Dr. Watson, who is also long-haired. His ears and tail tuft (not a flag, just a little bit that stuck off at the end of his tail) started growing when he was pretty young, but he didn't start getting long fur anywhere else for a long time...maybe around a year? Leading up to that, though, he did get really fluffy. He's almost 2 now, and it's still growing. It seems to get longer every time he gets a new coat, either growing his winter coat, or shedding it for summer.
However, a lot of long-haireds don't get the full long coat like you see on show dogs, with the full curtain on their sides, etc.
I don't know if it will help, but you can go to Watson's facebook page (link in my sig) and if you look at "photos of Dr. Watson" you can kind of see the subtle changes in his coat over time (although the dates aren't right on all of them because at one point I uploaded a bunch of puppy pictures all on one day.)
I hope that helps some, and I hope we get to see some pictures of Honey soon!