Yes, and there is a difference in being nervous and showing that you're nervous. For example, Adele (who BTW IMO has much more attention on her than Catherine does being the biggest musical star at the moment) said in an interview in April of last year that she gets so nervous that she tried to "escape" a venue. However, once she is on stage, there is not evidence of that. You wouldn't know of her stage fright or nervousness if you went by her appearances.
My point is, there is nothing wrong with Catherine being nervous, but she should work on lessening the fact that I
and others can tell that she is nervous. Also, Princess Anne and other royals have spoken of being nervous the first few times doing royal engagements, but again, you wouldn't know it just by looking at them at those engagements. Perception is everything -- I'm much more likely to buy something from a salesman who is nervous but appears confident than one who is nervous all around...
I'm okay with no one else on this board sharing my opinion, so this will be my last post on the topic, but I would just like her to improve a bit before she's called 'the greatest asset to the BRF'