My daughter has been boarding for about three years and is not bad. She is 10. My question is her board seems to be quite slow and frustrates her. She is about 70 lbs and her board is a Morrow, not high end. Any thoughts? Is she slow because of her weight or could it be the board. Are small entry level boards slower by design or because of their size? I've waxed her board and it really doesn't seem to help much. Her board is 128 cm. she is about 4ft 7 in.