She was so excited to start kindergarten, but since starting she is already losing interest...she's asked me if she can have a few days "off" because its boring and not as fun as she was expecting.
I'd vote for the skip for this reason.
Our 3 year old son was accelerated into PreK with 4/5 year olds and loves it. His comment after the first day was, "They can talk!" referring to his classmates. He still gets a little bored, but keeping up with older kids and the new material gives him a bit of a challenge.