My friend got this for her 10yr old dd for her birthday. She said it was a great match to her dd's Hannah Montana dress up clothes. So considering the target age for AG I guess they got what they were looking for!
FWIW as a former swimmer I can tell you that "real life" goggles are about as reliable as the AG ones (not very!). They frequently break, leak, leave rings,etc. so one could argue that they are indeed quite authentic!