I would say thats pretty normal. I started my plants with a really crappy incandescant grow light. They have stretched really bad. They are about 2 weeks old, and only are just developing their second set trues leaves. You made a good choice starting with fluorescants. I just upgraded to compact fluorescants.
Look at my pics if you want to see some slow growth, haha.
You should think about starting to nutriate the water soon. Look for the leaves turning a light green. Start slowly trying to add nutes at 1/4 strength. A medium green is a sign of healthy leaves.