How can you tell if a kitten is long or short haired

My cat Sassy has 5 beautiful kittens. Sassy is half persian and half birman and has semi long hair and a really fluffy tail. The kittens are all fluffy but i'm not sure how you can tell whether they are going to be long or short haired. The father is short haired. The kittens are 3 weeks old, but is it too early to tell?

I don't know the answers but can we see pictures?

I only have them on video camera at the moment but I will take some on my camera and post them as soon as possible. Thanks!!

My kitties are 6 weeks old and have a long haired mother and short haired father. it seems like the ones that look like Missy have longer hair than the ones that are like Mister.
I think you justhave to wait to really tell though