I actually agree with you!

I felt Danielle & Katelyn had great performances! Among of the best of the night. Danielle has always been my favorite. I love her voice! Katelyn's last 2 performances have really impressed me. She gets my vote for most improved!
I meant the "no one gave a perfect performance" comment as more of an all around comment. I might not have stated it in the right place or manner though. Between manner of dress, vocals, song choice, being comfortable on stage, etc., I don't feel anyone gave a "perfect" performance.
If someone gives a "perfect" performance then there is no room for improvement, right? You should always be able to improve on a performance and learn from your mistakes, not matter how minor.
Again, just my opinion.
