Not that this adds too much value cause my dd is so young and the test administrator was a student but dd took the WPPSI-III and scored fine yet knowing what she can do, I know she could have scored better. I wouldn't mind getting her tested again but at a much later age. Perhaps 5 was just too young? I didn't read every post but maybe she was just squirmy or didn't like the tester. DD stopped answering the Verbal questions because she "just didn't want to have to tell him anything anymore" and she scored a 134 VIQ - which we believe is probably higher if she kept telling him stuff.
I would wait another year and try again but don't be discouraged. If you know your dd is more capable than the tests say, then try again when she is a bit older.