Well, I won't say that she didn't have "any" problems. She was tested in prek at a 4th grade reading level. Kindergarten was torture for her while other kids were learning letters, sight words and phonics. The teacher finally gave up because she would get frustrated, esp. with phonics. They would want the kids to write the words how they sounded. She would do that but would get upset because she knew it wasn't spelled right. Finally, they gave up and gave her a "word" box. Any words she didn't know they would write on an index card for her.
She is now in 5th grade and an excellent speller. The teacher just said that sometimes gifted kids are "whole" learners.