H.W.
K....is your daughter receiving OT through LIU? My son is in a very similar situation (although he is 5 and will do the "bonus year" at the LIU in the fall and start kindergarten fall 2009 when he is 6). He is about 18 months delayed, so he is developmentally about 3 1/2 right now. He recognizes all of his letters but cannot write them at all. If I hold my hand over his, he can trace them (even if I don't apply pressure or guide his hand - go figure!) but everything looks like a stick or a circle. His OT through the LIU works and works with him, but she just can't get him to hold the pencil correctly. We practice and practice at home with no luck - the second I let go of the pencil or crayon he grabs it in his first instead of with his fingers. I have recently been reading up on dysgraphia...I don't think it actually fits - I think he's just significantly behind in his fine motor skills. Like your daughter, once he *gets* a skill, that's it - he gets it completely...I'm hoping this falls into that category.
Many years ago I found triangular shaped pencils for my older son and they really helped him grip better - he could never work with the rubber grips, all of them bugged him, but these really worked for him. I'm going to go on a mission to find these for Riley - they are thicker than regular pencils (more like the kind they use in kindergarten) but have three sides. Perhaps different shapes, or different grippers might help if you haven't tried that with your daughter (if you're anything like me, I've tried EVERYTHING...). I also let him do a lot of writing with white boards and write-on/wipe-off books. I got a GREAT one at BJs several months ago...it's HUGE and so are the letters. While he doesn't trace them, he does color them in and each time it gets a little closer to being in the lines...baby steps, right?
If she's not getting OT through the LIU, I know the clock is running down on the year, but there is still some time left and you'll have the summmer session, so it might be worth a shot. If she IS getting OT in preschool, I would DEFINITELY have a conversation with her OT about your concerns and ask that they step it up ASAP. Our OT through LIU is very nice, but she isn't very aggressive (I don't mean this in a mean sense, rather in a really pushing him sense). I also have Riley working with a private OT now and she works with him on this as well. I just keep hoping that if he gets it from a variety of places it will click...eventually.
Good luck - feel free to shoot me a note privately if I can be of help...I KNOW how frustrating this is! ~H.