I have just measured myself like yours very dissapointing! I Didn't have time to warm up, just did dynamic stretches, front and side. I will have to do it again with a proper warm up but here are my results:
Side split 30cms off floor exactly
Front split (Left forwards) 17cms off floor
Front split (Right forwards) 19cms off floor.
This is my first measurement so I hope we will be seeing improvements shortly
Also this is without a proper warmup so it might be a few cms lower after a warm up.